While collaborating on the physics project, Albert Einstein wrote to his colleague, Michele Besso, that _________ had discovered a flaw in the equation.

6
writing

The underlined portion makes the paragraph ambiguous. Replace it with the choice that best reduces that ambiguity.

A

he

B

the physicist

C

one

D

he himself

Correct Answer: D

Choice D is the best answer. The intensive pronoun "he himself" emphasizes that Einstein is the subject.

Choice A is incorrect because "he" is ambiguous. Choice B is incorrect because "the physicist" could refer to either. Choice C is incorrect because "one" is vague.