Answer: accurate sources and references to other works or literature.
Explanation:
When referencing sources, you are utilizing facts that have already been determined, and can back up your reasoning.
Answer:
Adjective:
of first importance; main
of the best possible quality; excellent.
(of a number) evenly divisible only by itself and one
Noun:
a state or time of greatest strength, vigor, or success in a person's life
The answer is letter choice c
The b best answer that I could see is D because it correlates to the actual question. But c also looks good because it gives a reason as why not to buy them from a shop/private owner.
Best of Luck...Nathan...L.
