He main reason that family and friends are frequent targets of aggression is that a. they're convenient. b. frustration-producing obstacles are often unclear. c. as obstacles, they're unremovable. d. they cause the most frustration.

i think the answer is probably a not 100% sure :)

answer; /// (nutrition) i believe is the correct answer;

answer; make a decision about which healthcare product to purchase///or review the decision about the healthcare product; good luck