Answer:
The correct answer is Jennifer is running in a track meet.
Step-by-step explanation:
We call present participle those words ending in ing. In this case Jennifer is running in a track meet. It can be used as an adjective or as a verb, and this is what differentiates it from the gerund.
Used as adjective: Jennifer is boring
As a verb: Jennifer is running.
The present participle if used both as a verb or as an adjective, will always be accompanied by another verb ---- is boring ----- is running.
Given this information, we can verify that the correct answer is Jennifer is running in a track meet.