Answer:
b. It adds credibility to the argument they wish to prove.
Explanation:
References from other sources adds credibility to a writers argument, especially when it comes from an expert source. References give an agrument more evidence and support and shows that they are people who agree with said agrument.
All of the other choices show a negative, or false effect of including a reference. Thus, the best option is b.
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Answer:
D. To build an argument that a government should represent the desires of its people
2,387,138 that's the population