It depends on how much you have.
If it’s above your maintence cals then you’ll gain and if it’s at maintence then you stay the same weight if it’s under you’ll lose weight
Because your body needs a certain amount of cals to be able function properly and the maintence cals are just the right amount of Cala your body needs to just be at a maintence.
You will lose if you are about 500-1000 Cals below your maintence cals you should lose one pound of fat in 1 -2 weeks
If you eat about 350 Cals above your maintence cals then you would gain an extra pound about every 10 days.
D is the answer because i took the same test and got it right
Most likely caused by her eating disorder/anorexia
The answer to your question is


As you get older many nutritional dilemmas start to pop up, such as loss of appetite, depression, menopause/prostate problems, heart disease, less taste, etc. All of these affect their nutrition and put them at risk for deficiencies.
I hope this helps you!