Answer:
D). Congressional record.
Step-by-step explanation:
Congressional Record is described as the official document or Journal published by the US government. This document details the record and description of all the arguments and affairs of the United States Congress.
As per the question, the primary source for obtaining particular information on a particular bill would be 'congressional record' as it is exemplified as the official record that would propose the authentic and reliable information that could further be employed for different researches or analysis. Thus, option D is the correct answer.