When readers use their own knowledge about a subject to come to a conclusion about a text, it is called a. finding a themeb. reading carefullyc. making inferencesd. questioning the textneed !

I think it's C making inferences

C.

When readers use their own knowledge about a subject to come to a conclusion about a text, they are making inferences.

in·fer·ence
/ˈinf(ə)rəns/Submit
noun
a conclusion reached on the basis of evidence and reasoning.
synonyms:deduction, conclusion, reasoning, conjecture, speculation, guess, presumption, assumption, supposition, reckoning, extrapolation
"there should be no inference drawn from the fact that he chooses not to be a witness"

That would be true i believe