Correct Answer: They might promote you this year.

Solution : The third option is the correct choice.

Active voice emphasises the doer of the action, while passive voice emphasises the receiver. To convert passive to active, we make the subject perform the action and rephrase the verb.

The structure of the active sentence is: " Subject + modal verb + base form of the verb + object."

Following the active voice form, we finally get: They might promote you this year .