I'm not 100% sure. but I believe it's the third option
"She bought the least expensive cage for George, the parakeet."
Answer:
c) Jack will not understand the club’s decision unless he talks to Christopher.
Explanation:
A vague pronoun is a pronoun that does not clearly indicate which antecedent (or noun) it is referring to. All options, except option C, have a vague pronoun because in these sentences it is not clear whether “he” (the pronoun) is referring to the antecedent “Jack” or “Christopher.”
Option C, on the other hand, is the one that corrects the vague pronoun because it clearly states that the pronoun “he” refers to “Jack” only.
Answer:
For Dickens, a good education could be the bulwark against ignorance, cyclical poverty and crime. Conversely, a badly run school could be the breeding ground for young, cunning criminals or, on the other hand, produce unimaginative, machine-like pupils ready for the industrial factory.