A place with a maximum resistance.
A ground is also called the earth in an electrical circuit. A ground is a place of lowest potential and least resistance in an electrical circuit. Ground/Earth is also a reference point in an electrical circuit from which voltages are measured and a common reference path for electric current.
B A place of lowest potential in a circuit.
C A reference point in the circuit from which voltages are measured.
D A common return path for electric current.