Multi-choice problem: Continue writing the next sentence in this paragraph:

How to play 100 floors
Launch 100 floors and tap on the green button to the right of the elevator.
This opens the elevator doors.
Tap on the green arrow located inside the elevator.

Available choices:
A). This will bring you to the elevator's underground floor. Place or place a hand on the elevator door and guide the door that hangs up into the air away from you.;
B). Now you can choose what subfloor you will be playing on. Alternatively, you can tap on any floor except the ceiling.;
C). After solving the puzzle on each level, the elevator doors will open to reveal the green arrow, which you must tap on to advance to the next level. Look for clues on every floor to help you advance to the next level.;
D). You will enter 100 floors on the second floor. Tap on the security checkpoint at the bottom of the elevator.;
C).