Answer:
Five factors are
1. Who is the author and is he/she credible?
2. Who does the author address/write to?
3. When was the source written?
4. Does the content agree with historical facts or contains it false information?
5. Does the author write about personal opinion or fact? How does he prove his claims? Does he use explanations or examples?
Step-by-step explanation:
Hope this helps!