Which source should be most carefully examined for credibility?
a. a textbook
b. a newspaper article
c. a website
d. a scholarly journal

I don't know the answer but the answer above me is wrong, I took the quiz

Explanation:

expository writing is one of the most common types of writing.

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.