Which is the correct answer and why are the other answers
wrong?

A body is said to be in Equilibrium whenever the two Conditions of Equilibrium this in mind, which of the following completes this statement correctly? For a body to be in equilibrium, the body 5. apply. With a) must be at rest must move with uniform acceleration c) must have uniform linear and rotary motion d) cannot be acted on by external forces e) must have the sum of the upward forces acting upon it just equal to its weight