Explanation
Correct answer: C.
Choice C is the best answer. The second sentence provides more specific information about the fieldwork mentioned in the first sentence—that the paleontological digs took place in Utah, Montana, and Wyoming. Therefore, “specifically” fits perfectly in this context.
Why the other choices are wrong
Choice A
Choice A is incorrect. This choice uses a disagreement transition. But this sentence doesn’t disagree with the previous sentence. Rather, this sentence agrees with and elaborates on the last sentence by providing more specifics about the fieldwork Black does.
Choice B
Choice B is incorrect. This choice uses a transition that indicates that an event took place after another event. But the two sentences are not describing different events—instead, this sentence gives more details about the fieldwork discussed in the first sentence.
Choice D
Choice D is incorrect. This choice uses a disagreement transition. But this sentence doesn’t disagree with the previous sentence. Rather, this sentence agrees with and elaborates on the last sentence by providing more specifics about the fieldwork Black does.