Your text describes the use of _______ to get a bull elephant to cooperate with having his toenails trimmed

Anyone can develop anxiety disorders. This is because we are all capable of learning, and have _______

a. sympathetic nervous systems b. neutral responses c. aggressive personality characteristics d. deep affection for the musician "Grimes"

What percent of Americans have been married at least once?

A) 60 B) 70 C) 80 D) 90