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【单选题】
有A和B两个集合，其中A集合包含20个数，B集合包含30个数。问B集合的RANGE是否小于45 (1)A集合中数的值域(range)是10 (2)如果把A，B集并起来，合并后的大集的值域为40A.
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.
(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．
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