Correct Answer: D
Explanation:
Choice D is the best answer because it is the only choice that provides a
grammatically standard and coherent sentence. The participial phrase
“Having become frustrated. . .” functions as an adjective modifying “I,” the
writer.
Choices A, B, and C are incorrect because each results in a dangling modifier.
The participial phrase “Having become frustrated . . .” does not refer
to choice A’s “no colleagues,” choice B’s “colleagues,” or choice C’s “ideas.”
As such, all three choices yield incoherent and grammatically incorrect
sentences.