Which of the following contains a vague pronoun reference?
A: Do the instructions say what these screws are used for?
B: Do they say what these screws are used for?
The second answer choice contains a vague pronoun reference. The pronoun they is used without its antecedent.
The first answer choice shows a possible correction for the vague pronoun reference. They has been replaced with the instructions.
Do the instructions say what these screws are used for?