Answer:


The correct answer is "is doing" because the sentence is describing an action that is happening at the current moment. The phrase "at the moment" indicates that the action is in progress right now.


The present continuous tense is used to describe actions that are happening at the current moment or around the current time. It is formed by using the present tense of the verb "to be" (am, is, are) followed by the present participle form of the main verb (verb + -ing).


In this sentence, the subject is "Jason" and the verb is "do." To ensure subject-verb agreement, we need to use the correct form of the verb based on the subject's number and tense.


- I am doing
- You are doing
- He/She/It is doing
- We are doing
- They are doing


In the given sentence, the subject "Jason" is singular, and the action is happening at the current moment. Therefore, we need to use the correct form of the verb "do" in the present continuous tense, which is "is doing."


The sentence structure of the correct answer is "subject + auxiliary verb (to be) + main verb (present participle form)." In this case, it is "Jason + is + doing."

Therefore, the correct answer is "is doing" because it accurately represents the present continuous tense and subject-verb agreement in the given sentence.