(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．

A certain bread recipe calls for whole wheat flour, white flour, and oat flour in the ratio of 3:2～1, respectively. How many cups of oat flour are needed to make a loaf of bread
(1) A total of 30 cups of whole wheat and white flour are needed to make 3 loaves of bread.
(2) Two more cups of whole wheat flour than white flour are needed for every loaf.