Final answer:
A student who restricts fruits and vegetables on a weight-loss diet may be more susceptible to viral infections due to Vitamin C deficiency.
Step-by-step explanation:
The correct answer is option a. A college student who is on a weight-loss diet that restricts fruits and vegetables may become more susceptible to a viral infection due to Vitamin C deficiency, which affects the production of white blood cells. White blood cells are crucial components of the immune system and play a major role in protecting the body against infections. Vitamin C is essential for the proper functioning of white blood cells and a deficiency in this vitamin can weaken the immune system, making individuals more vulnerable to infections.
Learn more about Vitamin C deficiency and susceptibility to viral infections