B. It may include directions that explain what the stage should look like or how characters should behave on stage.
Hope this helped!
The man walked across the ground
waiting for the very found sound
he waits and triumphs when it’s done
for he had taken a flower gun
the flower screams in pain
and petals fall like rain
The sentence in which the underlined infinitive phrase functions as a subject is the last one - to quickly move large groups of people is the purpose of public transportation.
<em>To quickly move </em>is the infinitive phrase, and it is a subject.