Gino is starring in the school play, which opens next week is the best revision of the sentence. Thus, option c is correct.
The complete question is: Gino is starring in the school play, it opens next week. Which revision best corrects the sentence?
Revision of the sentence is a correction and revising of the original sentence that alters the punctuation and the use of the grammar to make it simple and easy to read.
In the original sentence the use of the word "it" is incorrect and it is not clear to whom the sentence is referred and sounds incomplete. The singular and the plural form of the pronouns must agree with the numbers and the gender of the subject.
Therefore, option c. the sentence using the word which is correct.
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