Which of the following is a reason to use a direct quotation? when the words of an authority are needed to emphasize the point when you don’t understand an idea or know how to state your point when the quote is a good length and fits well into the paragraph when it’s the only support you have for a point

when the words of an authority are needed to emphasize the point.

Explanation:

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.