Which of the following contains a vague pronoun reference?
A: The jeweler carefully polished the ring once he had removed the precious gemstone from it.
B: After the jeweler removed the precious gemstone from the ring, he carefully polished it.
The second answer choice contains a vague pronoun reference. The pronoun it could refer to the precious gemstone or the ring.
After the jeweler removed the precious gemstone from the ring, he carefully polished it.
The first answer choice shows a possible correction for the vague pronoun reference. The text has been rewritten so that the meaning is clear.
The jeweler carefully polished the ring once he had removed the precious gemstone from it.