Which Observation Demonstrates That the EMTs and EMRs Are Correctly

Which observation demonstrates that the EMTs and EMRs are correctly using the stair chair?

A) The wheels of the stair chair touch each and every step.
B) The stair chair slides down the stairs while tilted forward.
C) The patient is carried down the stairs feet first.
D) The stair chair is carried down the stairs with the chair tilted forward.