Question

Which questions would help determine whether an article is scientifically accurate?

Answer 1

Answer:

Option A and C

Explanation:

When the question A is asked "whether the author's statement is an opinion or fact?" then the answer to this question will definitely help to determine whether the author has written a scientific article or not. If the author states that he has expressed his opinion then such articles cannot not be considered as scientific article.

Likewise if the author has given appropriate and sufficient evidences to prove the fact that he had mentioned in his article then  such articles will definitely fall into the category of scientific article. Hence option C is correct.

Question B, E are totally irrelevant

While question D is just a way to analyse whether the author is renowned author  who publishes sensible article or he is a new comer. This question is basically to check the authenticity of the author writing skills.

Answer 2

I think it would be:
Is the author stating fact or opinion?
Does the author have evidence for the given facts?

Maybe
How many article has the author written before?

Ones you add if you wanted to is
Does the author give any sources? (Like where they got the info)