Jerome got in the elevator on the first floor of his office building. He went up 20 floors to his office. Then, Jerome took the stairwell down 3 floors for a morning meeting. After the morning meeting, he took the elevator down 7 floors for lunch in the cafeteria. Then, Jerome took the stairwell up 5 floors for an afternoon meeting. On which floor was his afternoon meeting?
A.
twenty-second
B.
sixth
C.
sixteenth
D.
thirty-sixth