Protecting the body from disease is the primary function of this type of protein:

In which of the following situations is a person the LEAST likely to do nothing

a. The person sees a victim, but doesn't have training to do first aid. b. The person sees a victim and there are many others around. c. The person sees a victim collapse next to him or her. d. The person sees two children, who look similar, fighting.

However widespread and broadly functional correlational studies are, the main drawback is they

a. cannot show causation. b. show stronger relevance in the positive direction. c. can only be re-created in the laboratory. d. are often seen as too realistic.