In a study examining the effects of gender (male or female) and major (psychology, computer science, philosophy, or biology) on college students' willingness to perform community service, what is the factorial notation?

Those who favor smaller high schools argue that

A) science labs, libraries, and sports facilities are unnecessary luxuries. B) students in smaller schools feel less alienated and more attached to their schools. C) breaking up big high schools reduces problems with gangs. D) smaller schools are more energy efficient.

Exercise has ________ effect on intellectual skill

a. a negative b. a minimal c. no measurable d. a positive