Please answer the following question by reasoning step-by-step.
If 21 WOMen and 12 men can finish the work in 42 days.How many men should accompany 42 women to that the work will be completed in ten and half days???\nOptions:\n(A) 40\n(B) 45\n(C) 50\n(D) 60\n(E) 15

(E)
15 men using chain rul.

So, the answer is (E)