The Thévenin Equivalent Circuit for the Circuit to the Left

Multiple Choice

The Thévenin equivalent circuit for the circuit to the left of the terminals X and Y in the following circuit is:

A) A voltage source of 4 V with series resistance 25Ω
B) A voltage source of 4 V with series resistance 8Ω
C) A voltage source of 5 V with series resistance 25Ω
D) A voltage source of 5 V with series resistance 8Ω