Explanation: The witness states that he has work only about 2 days each week, and that he needs to let his children work (necessity compels him). There is no owner forcing him. The phrase “necessity compels a man” refers to his own need for his children to work (A). There is no indication that the children need discipline (C). The phrase “moderate labour” does appear, but the speaker is saying that he would prefer reasonable hours, even if he earns less (D).