Two identical objects of mass m are connected to a massless string which is hung over two frictionless pulleys as shown below. If everything is at rest, what is the tension in the cord?
[Figure: Two masses connected by a string over two pulleys in equilibrium]
a) Less than mg.
b) Exactly mg.
c) More than mg, but less than 2mg.
d) Exactly 2mg.
e) More than 2mg.