A System Is in an Unstable Equilibrium If

Multiple Choice

A system is in an unstable equilibrium if

A) after the system is disturbed slightly from its equilibrium position,it returns to its original position.
B) after the system is disturbed slightly from its equilibrium position,it moves farther away from its original position.
C) after the system is disturbed slightly,no torques or forces act in either toward or away from the original position.
D) the system does not move when slightly disturbed.