If A, B and C together can finish a piece of work in 6 days. A alone in 12 days and B in 18 days, then C alone can do it in?	Choose the correct choice from the following choices.
A) 1 B) 7 C) 8 D) 9 E) 36
C = 1/6 - 1/12 – 1/18 = 1/36 =&gt; 36 days'   Answer: 36
<result>E</result>
If A, B and C together can finish a piece of work in 6 days. A alone in 12 days and B in 18 days, then C alone can do it in?