If 2 persons can do 2 times of a particular work in 2 days, then, 7 persons can do 7 times of that work in
?	Choose one.
A) 3 days
B) 7 days
C) 9 days
D) 2 days
E) 15 days
That is, 1 person can do one time of the work in 2 days.   Therefore, 7 persons can do 7 times work in the same 2 days itself.   Option '2 days'
<result>D</result>
If 2 persons can do 2 times of a particular work in 2 days, then, 7 persons can do 7 times of that work in
?