-Refer to the Information Above

-Refer to the information above.To increase output from 33 to 66 units requires ______ extra employee-hour(s) ;to increase output from 66 to 99 units requires _____ extra employee-hour(s) .

A) 1;1
B) 1;2
C) 2;1
D) 2;4
E) 3;7