For an arterial blood gas (ABG) to have full compensation, which of the following statements is correct?

D. As individuals age, there is a natural decline in the amount of deep sleep (slow-wave sleep or Stage N3 sleep) they experience. Older adults tend to spend less time in deep sleep and may experience more fragmented sleep patterns, with more frequent awakenings during the night. This reduction in deep sleep is a normal part of the aging process and is associated with changes in sleep architecture and physiology.
A. Research indicates that a significant portion of the population does not get enough sleep, with many adults experiencing sleep deprivation due to various factors such as lifestyle, work schedules, and sleep disorders.
B. Teenagers often have a natural tendency to stay up later and have difficulty waking up early due to changes in their circadian rhythm during adolescence. This shift in sleep patterns, known as delayed sleep phase syndrome, can result in later bedtimes and waking times for teenagers.

C. Sleep needs typically change over the course of a person's lifetime. Infants and young children require more sleep than adults, with sleep duration gradually decreasing as individuals age.
Additionally, factors such as lifestyle, health status, and environmental influences can affect sleep needs at different stages of life.

B. Physical therapy, also known as physiotherapy, is a discipline focused on the preservation, enhancement, or restoration of movement and physical function. Physical therapists assess and treat individuals with musculoskeletal, neuromuscular, cardiovascular, and other conditions to improve mobility, strength, flexibility, balance, and coordination through therapeutic exercises, manual therapy techniques, and functional training.
A. Respiratory therapy focuses on the assessment, treatment, and management of patients with respiratory and cardiopulmonary disorders. Respiratory therapists specialize in providing interventions such as oxygen therapy, mechanical ventilation, and pulmonary rehabilitation to optimize respiratory function and improve breathing.
C. Speech therapy and language pathology, also known as speech-language pathology (SLP), is a discipline that focuses on the assessment and treatment of communication disorders, swallowing difficulties (dysphagia), and cognitive-communication impairments. Speech-language pathologists assess and treat individuals with speech sound disorders, language delays, voice disorders, fluency disorders (stuttering), and communication difficulties associated with neurological conditions or injuries.
D. Occupational therapy is a discipline focused on promoting health and well-being through meaningful engagement in daily activities (occupations). Occupational therapists assess and treat individuals of all ages who are experiencing physical, cognitive, psychosocial, or sensory impairments that affect their ability to participate in activities of daily living (ADLs), work, leisure, education, and social participation. Occupational therapy interventions aim to enhance independence, functional performance, and quality of life.