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Reading the birth picture of Dolly the cloned sheep, the following statements are correct: (a) Sheep C can't provide Dolly the cloned sheep with enough nutrition.
C

Test analysis: Sheep A and C are surrogate ewes, which can provide Dolly with rich nutrition. A is incorrect;

B, Dolly the cloned sheep is not fertilized, so it belongs to asexual reproduction, not the product of transgenic, and B is incorrect;

C, through analysis, it can be concluded that the genetic information is in the nucleus, and C is correct.

D, ABC is strong, and D is incorrect;

So choose: C.