Which sentence correctly places the modifier to avoid confusion?

The correct answer to the question "Which sentence correctly places the modifier to avoid confusion?" is Option D: He bought a used car with a broken headlight from a salesman..

The other options — A) He bought a used car from a salesman with a broken headlight., B) With a broken headlight, he bought a used car from a salesman., C) From a salesman, he bought a used car with a broken headlight. — are incorrect for this CLEP Exam Prep question. As explained above: In option D, 'with a broken headlight' is placed directly after 'car,' clearly indicating that the car has the broken headlight. In option A, the modifier ambiguously refers to the salesman.