Three different lumberjacks can chop W amo

问题：

Three different lumberjacks can chop W amount of wood in 30 minutes, 45 minutes, and 50 minutes according to their different levels of skill with the axe. How much wood, in terms of W, could the two fastest lumberjacks chop in 2 hours ？（）

A.A

B.B

C.C

D.D

E.E