Girl friend or friend needed

The majority of early psychological research reflected the a. differences among males and females b. concerns and interests of minorities c. differences among various cultures d. concerns and interests of white males select the best answer from the choices provided a b c d

Ireally need to know this answer asap

What is one technique to a person get proper sleep? eat a heavy meal before bed. exercise intensely before bed. practice relaxation breathing before bed. use electronics before bed.