The sentence should be corrected as follows: "The Olimpic athlete raced down the slopes because he hoped to win the gold medal."
The correct options are:
* by changing "though" to "because" since it is proving an explanation to the 1st part of the sentence.
* by changing "hopes" to "hoped" since the 1st part of the sentence is in the past tense.
The incorrect options are:
* by removing "down the slopes" since it adds details about the meaning of the sentence.
* by replacing "he" with "the athlete" since the latter is already mentioned in the sentence and can be replaced by personal pronoun "he".
* by replacing "the gold medal" with "it" since the latter is not mentioned before in the sentence. Therefore, it cannot be replaced by the personal pronoun "it".
The answer would be rebuttal, because that is after one accuses the other, the "prey" (one being accused) has time for a rebuttal, to prove them wrong.
