In a group of people, if 30 people were made to stand in each column, 16 columns could be formed. If 40 people were made to stand in a column, how many columns could be formed?  Pick one:
A) 12  B) 14  C) 16  D) 18  E) 20

Rationale: "16 * 30 = 40 * n n = 12 the answer is a ."
Answer: A