Concept:The error lies in the misuse of “it's” (contraction of “it is” or “it has”) instead of “its” (possessive pronoun).Explanation:The sentence reads: “(a) In 1989, the government (b) did an about-face and Iran restored (c) it's family planning program.”In part (c), “it's” is incorrect because it means “it is” or “it has,” which does not fit here.The correct possessive form is “its,” showing that the family planning program belongs to Iran.Thus, the error is in part (c).Answer:C