Answer:
A. They destroy antigens because they are a foreign object.
Answer:
The question is incomplete, the missing part says: and suggests that maybe it is caused by stress. Hadad worries that there is something physically wrong, and he doesn't feel these symptoms are stress-related. What can he do?
He should visit another doctor or be persistent with his doctor.
Explanation:
Haddad should visit another doctor that may have a different point of view or run different tests on him. Another possibility is to keep visiting his doctor and claiming that he is not feeling well until the doctor finds out what is the problem with more tests or a deeper examination.
3) because during the menstrual cycle the body is already trying to clean out the uterine lining and the old egg is already in that. So having a new egg drop in form the ovary at the end of the cycle makes more sense.
Answers A and D are found on my prescription bottles.