Paula's management professor just told her class that the final exam is optional for students like Paula who currently have an A. Paula decides to take the exam anyway because she likes the subject and wants to master the material. Paula is motivated to take the exam by a(n) .

The answer is intrinsic reward.

Explanation:

Intrinsic rewards are those which come from an internal desire, such as self-growth or pure enjoyment of the task. Other rewards such as money or recognition are not involved.

Studies have found out that intrinsic motivation is the most effective in different areas, like school or the workplace.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."

the answer to your question is,

d. when a child was born.

-mabel < 3