The sentence that is rewritten in the subjunctive mood is option A) I wish I were going to the movies with you this Friday”
The subjunctive mood is used in formal written English to express unreal conditions, suggestions or wishes. In this case, the example is related to wishes and it is formed by the word “wish” and the verb in the subjunctive voice is “were going”. As we can see the auxiliary “were” does not keep the same form of the person “I” because it is in the subjunctive mood.
Option B is not in the subjunctive mood, it is using an indicative mood
Option C is not in the subjunctive mood since it is a question in the present tense.