Why did the Second Engineer wish to make a monthly allotment?

An allotment is a portion of one's pay that is set aside for a specific purpose, such as sending money to a family member or paying off a debt. In this case, the fact that the Second Engineer's marital status is mentioned in one of the options suggests that the reason for the allotment may be related to his family. Option A does not provide a clear reason for the allotment, while option B suggests that the Second Engineer simply wants to rest, which is not a valid reason for making an allotment. Option C is also irrelevant, as being unmarried does not necessarily mean that one would want to make an allotment. Therefore, the correct answer is D - the Second Engineer wished to make an allotment because he was married and likely wanted to send money to his spouse or family.