I assume that there is choices considering you said which?
The answer is mostly likely B.
1) D.
2) A. (??)
3) B.
4) "Some of these nouns are pretty amusing."
Answer: Nothing
Explanation: I don't see what is wrong with child labour. It's normal.
Answer: memo consists of two parts: the identifying information at the top, and the message itself. At the top, identify for whom the memo has been written, who is sending it, the subject, and the date. The subject line serves as the memo's title.
Explanation: