The nurse is explaining to a patient the purpose of certain lab tests that have been ordered.
A carcinoembryonic antigen (CEA) test was ordered and the patient is asking what this value will indicate. Which of the following is correct?

Choice A rationale
Consuming large meals can exacerbate GERD symptoms. Smaller, more frequent meals are recommended to reduce the volume of food in the stomach at any one time, thereby reducing the pressure on the lower esophageal sphincter.
Choice B rationale
Identifying and avoiding foods that cause discomfort is a key strategy in managing GERD. Foods that commonly trigger GERD symptoms include fatty foods, spicy foods, acidic foods, and caffeine.
Choice C rationale

Using pillows to elevate the head and upper body during sleep can help prevent nighttime GERD symptoms. Gravity helps keep stomach acid in the stomach, reducing the chance of it flowing back into the esophagus.
Choice D rationale
Lying down after a meal can exacerbate GERD symptoms. It is recommended to wait at least three hours after eating before lying down.

Choice A rationale
Folate, also known as vitamin B9, is essential for many functions in the body, including cell growth and division, amino acid metabolism, and the formation of white and red blood cells. However, it is not the treatment for pernicious anemia.
Choice B rationale
Pernicious anemia is a condition where the body cannot absorb enough vitamin B12 in the small intestine, causing a drop in red blood cells. Treatment for pernicious anemia involves vitamin B12 injections or oral supplementation to restore levels to an optimal range, followed by continued injections or oral medications to maintain these levels.
Choice C rationale
Vitamin C is essential for the growth, development, and repair of all body tissues. It’s involved in many body functions, including the formation of collagen, absorption of iron, the immune system, wound healing, and the maintenance of cartilage, bones, and teeth. However, it is not the treatment for pernicious anemia.
Choice D rationale
Iron is a mineral that our bodies need for many functions. For example, iron is part of hemoglobin, a protein which carries oxygen from our lungs throughout our bodies. However, it is not the treatment for pernicious anemia.