Which sentence must be revised to eliminate the preposition at the end? if no one answers the door, then let yourself in. the top steps are fine, but be careful of the slippery stairs below. where are katelyn and ella walking to? do you know what naveen was talking about?

The top steps are fine, but be careful of the slippery stairs below.

Explanation:

In this case, there was a mistake in the noun stairs, or the final preposition below must be removed. Two possible correct options are:

The sentence that must be revised to eliminate the preposition at the end is the top steps are fine, but be careful of the slippery stairs below.

Explanation:

Option B is the one that can be revised since it has two nouns steps and stairs and it is talking about two different things so it does not need the preposition to make the comparison between up and down. The other options need the preposition so they do not affect the meaning of it, in option A "let in" is a separable phrasal verb and it needs both parts to be grammatically correct, options C and D are preposition questions which have the characteristic of closing with a necessary preposition, "walk to" expresses direction and "talk about" refers to the specific topic.

answer; all of the above are correct;