The revision that punctuates the parenthetical expression correctly is as follows:
Thus, the correct option is D.
Punctuation may be defined as the types of marks or symbols that are utilized in writing detached sentences and their components which yield a clarified meaning of the sentence.
A punctuation mark (comma) is placed between game and therefore to separate the component of the sentence from the actual intention of the sentence.
Therefore, the correct option for this question is D.
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