D. Since the t in the is not capitalized, the sentence before it should end with a comma inside the punctuation marks
While writing again, the girl kept checking the time because she feared that her time would be up before she finished.
Answer: A
Explanation:
The evolution of dogs is a scientific topic that has a lot of scientific research backing it up. So, the most reliable source would be one that is revised by people well versed in this area of knowledge. An academic paper revised by peers is an official, trustworthy source.
PRO gress,,PRE conceived, PRE cede, POST mortem(?), POST script, PRE amble ... perhaps ?