Which is a direct benefit of prohibiting nicotine and tobacco use in schools? an increase in student enrollment the prevention of second-hand smoke an increase in participation in sports a decrease in the sale of e-cigarettes

A direct benefit of prohibiting nicotine and tobacco use in schools is the prevention of second-hand smoking. All other alternatives are not correct or lack details (for example: the sale of e-cigarettes may be affected by nicotine restrictions in schools, but it isn't necessarily a "benefit", since many experts point that e-cigarettes may be less harmful than regular cigarettes).

the correct answer is B

i think its the outcome of people's preferences.