Have recent changes in attitudes affected sexual behavior?

How does a teaching certificate affect one's prospects for acquiring a job in the education field? a. teaching certificates are required in very few u.s. states, so acquiring one is generally not beneficial. b. most public and private schools require teaching certificates, so acquiring one is crucial in obtaining a teaching job. c. the acquisition of a teaching certificate generally does not affect one's job prospects as they are not usually required by schools. d. since teaching certificates are only required to teach early childhood development classes, one would have more options and be able to teach younger students.