Which of the defense mechanisms listed below is the most primitive?

Infants born to teenagers have a higher rate of problems because

A) teenagers' reproductive organs are not yet mature enough to support a pregnancy. B) teenagers are not yet physically ready to give birth. C) many pregnant teenagers are afraid to seek medical care. D) teenagers are exposed to more teratogens than other pregnant mothers.

Anton Mesmer, an early 18th century physician, purported to be affecting cures in patients by unblocking their flow of a bodily fluid he called "animal magnetism.". In fact, any effectiveness of his methods was actually due to a. undetectable magnetic fields

b. chemically induced humoral balance. c. mental telepathy. d. the power of suggestion.