Answer:
The correct answer is letter "B": Parked.
Step-by-step explanation:
Transitive verbs are verbs that demand objects. Without and object to affect, the sentence that inhabits the transitive verb will not be complete. For example:
*Lila threw the ball.
If we just say "Lila threw" the phrase does not convey complete meaning to be a sentence. It needs the object "the ball" for it to fulfill the idea. In the case given:
*My mom parked the car as I waited on the curb.
We identify only 2 verbs: parked and waited. Out of the two of them, parked needs an object which is the car, while waited does not need one. It has a compliment that is "on the curb". So, the transitive verb in the sentence is parked.