​Which of the Following Working Postures Is Not Considered Proper

Multiple Choice

​Which of the following working postures is not considered proper ergonomics?

A) ​Upper arms and elbow extended outward.
B) ​Head,neck,and truck are faced forward,not twisted.
C) ​Forearms,wrists,and hands are straight and in line,forearm at about 90 degrees to the upper arm.
D) ​Shoulders and upper arms are in line with the torso,generally about perpendicular to the floor and relaxed,not elevated or stretched forward.