What the correct answer

I beleive it is c as it is a list but could be d, since D is a time but in number form i dont think it is. I would go for C

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.

you have to tell us what you're talking about or it's impossible to answer.