(A) 条件(1)充分，但条件(2)不充分．
(B) 条件(2)充分，但条件(1)不充分．
(C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
(D) 条件(1)充分，条件(2)也充分．
(E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
Over a seven-week period a company monitored the output of two of its branches, C and D. Each week the company calculated how many units were produced in each branch. The branch that produced the greatest number of units for four or more of the seven weeks was considered the more efficient branch. Which office was deemed the more efficient
(1)Over the seven-week period Branch C produced twice as many units as Branch D.
(2)The branch that was more efficient was known by the fifth week.
