What makes a source credible? O It is found online.
O It contains bias.
O It is believable or trustworthy.
OIt supports multiple perspectives.

C) It is believable or trustworthy.

Explanation:

The definition of a credible source can change depending on the discipline, but in general, for academic writing, a credible source is one that is unbiased and is backed up with evidence. When writing a research paper, always use and cite credible sources.

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c) troops march forward in close formation against newer, more accurate weapons

d is the right answer