What is the general function of autoreceptors?

I might be best to say that adaptive theory explains _____, whereas restorative theory explains_____.

a) why we need to sleep, when we need to sleep b) where we need to sleep, why we need to sleep c) why we need to sleep, where we sleep d) when we sleep, why we need to sleep

Which of the following statements about mate selection is true?

A) Romantic love is rarely an important factor in mate selection. B) Little support exists for the idea that "opposites attract." C) People rarely select partners that resemble themselves. D) Partners who are similar in personality tend to be less satisfied with their relationship.