If you take a part-time job while you are still in school, what might your opportunity cost be?

Your opportunity costs might be worse grades overall, as you'll have less time to devote to school. You will have less time on your hands due to having to work, even a small amount of time. There will be upfront costs for transportation so one opportunity cost might be weighing the profits of the job, over the cost for transportation to that job.

the following best describes postwar era writers in their works:

many writers,authors,novelists,poets concentrated more on social art and social writing and stayed away from political writings.

oil! is what i am assuming