Choice C is the best answer. The author is appreciative of pharming and describes it as turning "animals into living pharmaceutical factories" (lines 10-11,"simple... factories"). She expresses a positive view of pharming in line 70, when she describes its end result: "Et voilà—human medicine!"
Choices A, B, and D are incorrect because the author's attitude about pharming is not accurately characterized as one of fear, disinterest, or surprise.