8 men, working 8 hours a day can complete a work in 18 days. How many hours a day must 12 men work to complete the same work in 12 days? Choose the correct choice from the following: A) 6 B) 7 C) 8 D) 9 E) 10

Rationale: "the number of hours required to complete the work is 8 * 8 * 18 = 1152 12 × 12 × ( x ) = 1152 x = 8 the answer is c ."
Answer: C