A fully hermetic compressor on a 3 ton residential split system has three electrical terminals on the side of the compressor. An ohmmeter reads the following: terminal A to B = 20 ohms, A to C = 15 ohms and B to C = 5 ohms. There was a reading of infinity between all three terminals to ground. Which terminal is the common terminal?
A: Terminal A is common
B: Terminal B is common
C: Terminal C is common
D: There is no common terminal on this type compressor
