Dr. smith, a college instructor, is having difficult getting students to turn in papers. previously he had not assigned credit for homework; rather, he had simply assumed that students would do it for the practice. dr. smith establishes a policy that all students who turn in papers will get full credit for their work students now turn in papers much more often.
a. positive reinforcementb. negative reinforcementc. punishmentd. extinction

A. Positive reinforcement

Explanation:

Because since the teacher will give credit for the homework the students started to turn in work.

,identify or describe the affordable care act. how has aca changed healthcare in the us since implementation? you may professionally express your opinion on aca, do you think it will or hurt patient care?

just be there for her.

explanation:

not necessarily literally but figuratively. also don't say things like "i understand how you feel", because even though you are trying to , you clearly don't understand how she feels (i'm gonna go out on a limb here and assume you've never had a heart attack). also just let her rest. that is one of the best things for you to do.