While trekking through the dense Amazonian rainforest, _________
Which choice completes the text so that it conforms to the conventions of Standard English?
the vibrant plumage of a macaw caught the biologist's eye.
the biologist was captivated by the vibrant plumage of a macaw.
a macaw with vibrant plumage captivated the biologist.
surprise was the biologist's reaction to the vibrant plumage of a macaw.
Correct Answer: B
Choice B is the best answer. The introductory phrase "While trekking through the dense Amazonian rainforest" describes an action performed by a person. "The biologist" is the correct subject to follow the modifier.
Choice A is incorrect because "the vibrant plumage" cannot trek through a rainforest. Choice C is incorrect because "a macaw" is not the subject engaging in the trekking described. Choice D is incorrect because "surprise" cannot trek through a rainforest.