某机构向12位教师征题,共征集到5种题型的试题52道,则能确定供题教师的人数。(1)每位供题教师提供题数相同。(2)每位供题教师提供的题型不超过2种
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)都不充分,但联合起来充分
D.条件(1)充分,条件(2)也充分
E.条件(1)不充分,条件(2)也不充分,联合起来仍不充分

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