Answer:
By the production of white blood cells and antibodies.
Explanation:
The immune system's job is to identify foreign object and to make antibodies and white blood cells to fight said virus.
Out of the choices given, to ensure that Rachel properly applied all the necessary FITT principles to her plan, she needs to add more cardiovascular training to her exercise routine and eat several low-calorie meals throughout the day. The correct answer is A.
Bad decisions are what consequences result from
not enough info to answer
