If A, B and C together can finish a piece of work in 4 days. A alone in 6 days and B in 18 days, then C alone can do it in?
Select the correct option: A) 1 B) 7 C) 8 D) 9 E) 36

Rationale: "c = 1 / 4 - 1 / 6 – 1 / 18 = 1 / 36 = > 36 days ' answer : e"
Answer: E