The correct answer is Subjunctive
Explanation:
In the English language, there are different grammatical moods including the indicative, imperative, injunctive, interrogative and subjective mood use that express different attitudes of the speaker. In the case of the subjunctive mood, this mood describes situations that are not facts but conditions, this type of mood can be identified because it uses the conditional "if" or verbs like ask, demand, suggest, insist, prefer, etc that express a request or demand. Also, this differs from the imperative mood, because in the imperative mood sentence begin with the main verb and are a command, for example, the sentence "I prefer you come now" is subjunctive, while the sentence "Come now" is imperative.
Considering this, in the case of the sentence ""I insist that all of you arrive on time" and the verb "arrive" that is marked, the mood would be subjunctive considering this verb is linked to the verb "insist" that belong to the subjective mood and therefore expresses a condition rather than a command, fact, etc.
