A Significant Step in "Unifying" the Forces of Nature Was

Multiple Choice

A significant step in "unifying" the forces of nature was the discovery that two of the so-called fundamental forces were two parts of a single force. The two forces that were so unified were

A) the electromagnetic force and the weak force.
B) the electromagnetic force and the strong nuclear force.
C) the electromagnetic force and the gravity force.
D) the weak force and the strong nuclear force.
E) the weak force and the gravity force.