Which of the following contains a vague pronoun reference?

 - The Hardings make delicious pies; Julia was delighted to find them at the farmers' market.
 - Julia was delighted to find the Hardings' delicious pies at the farmers' market.
The second answer choice contains a vague pronoun reference. The pronoun them could refer to the Hardings or delicious pies.
The Hardings make delicious pies; Julia was delighted to find them at the farmers' market.
The first answer choice shows a possible correction for the vague pronoun reference. The text has been rewritten so that the meaning is clear.
Julia was delighted to find the Hardings' delicious pies at the farmers' market.