When should periods be used in a list

"now they have beaten me, he thought. i am too old to club sharks to death. but i will try it as long as i have the oars and the short club and the tiller."? this passage shows santiago's belief that a. he will never fish again. b. he is too old to continue fishing. c. man can be defeated but not destroyed. d. the sharks got the best of him.

Select the correct answer from each drop-down menu. read the following excerpt from the novel "oliver twist" by charles dickens. although oliver had been brought up by philosophers, he was not theoretically acquainted with the beautiful axiom that self-preservation is the first law of nature. if he had been, perhaps he would have been prepared for this. not being prepared, however, it alarmed him the more; so away he went

American history (is, are) studying the american colonies.