If a angular velocity graph for an elbow starting from a fully flexed position had twice as

much area above the zero mark on the meters$/$second axis $($X$-$axis$)$ than below, which

statement would be true: $(1)$

a$.$ The elbow has undergone no angular displacement.

b$.$ The elbow has been moved through a full range of motion.

c$.$ The average angular velocity for the movement was zero.

d$.$ The elbow is at $90$ degrees of flexion.

e$.$ None of the above.