C. restricting stomach size and reducing nutrient absorption
Explanation:
Gastric bypass is surgery that is aimed at helping you lose weight by changing how your stomach and small intestine handle the food you eat. It is usually recommended for obessed people to help them reduce weight.
Wheb the surgery is done with, your stomach will be smaller. You will feel full with less food. This is what leads to the loss of weight.
When this is done, the food you eat will no longer go into some parts of your stomach and small intestine that absorb food. This is will make your body not to get all of the calories from the food you eat.
