A nurse is reinforcing teaching about a high-fiber diet with a client who has constipation. Which of the following foods should the nurse include as sources of fiber? (Select all that apply.)

A. The duodenum is the first part of the small intestine but is not the primary site for vitamin B12 absorption. It's primarily absorbed in the lower part of the small intestine called the ileum.
B. While the stomach plays a role in releasing intrinsic factor that aids in B12 absorption, the actual absorption occurs in the small intestine, particularly the ileum.
C. Vitamin B12 absorption primarily occurs in the lower part of the small intestine, facilitated by intrinsic factors.
D. The large intestine is mainly responsible for water absorption and electrolyte balance, not vitamin B12 absorption.

A. Older adults often experience decreased taste and smell sensitivity, leading to reduced appetite and interest in food.
B. While tissue repair might be needed, aging doesn't necessarily demand more calories solely for this purpose.
C. Taste preferences may change with age, but not necessarily a universal decrease in the taste for sweets.
D. Nutrient requirements may remain relatively stable or decrease due to changes in metabolism and decreased activity levels rather than solely due to cell loss.