Utilize your creative thinking skills to generate a new idea that promotes useful change in your life or for society. Think Solar Panels, Hybrid Cars, Flying cars, etc. Have fun with this!

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.

i feel like it is actually b.

hm, switch the relative; nominative and indefinite; objective ? not too bright in the knowledge of the english.

the answer is c bro ok