An infinitive usually consists of the words "to" plus a verb in its simplest form. Which makes "to finish" seem like the most logical choice.
I hope this is correct and helps you :) good luck!
This sentence is an example of this primary English sentence pattern:
D. Subject (the toddler) + action verb (tossed) + indirect object (his father) + direct object (the ball).
The words in the sentence that make up the adjective phrase are from space. They modify aliens. Therefore D. is the correct answer.
