Question

an archaeological excavation exhumed a small white object initially believed to be a fragment of human bone. however, subsequent examination suggested that the object was an ivory comb with the teeth broken off, a hypothesis confirmed by the discovery of fossilized lice when the comb was viewed under a microscope. while the comb was made of ivory, there were no elephants in the region in which it was discovered during the period when it was made. _, researchers concluded the comb must have originated elsewhere before being brought to the site. which choice completes the text with the most logical transition? a additionally b however c meanwhile d therefore

Explanation:

The first part of the text describes the initial belief about an object being a fragment of human bone and then the discovery that it was an ivory comb. The second - part discusses the conclusion about the comb's origin. "However" is used to show a contrast between the initial hypothesis and the new discovery. "Therefore" implies a conclusion based on evidence, which is appropriate here as the conclusion about the comb's origin is drawn from the facts presented.

Answer:

D. Therefore