The Thevenin voltage and the resistor in the given circuit is ______ and ____, respectively.

• A. 43.2 V, 2.1 kΩ
• B. 20.57 V, 2.1 kΩ
• C. 2.57 V, 20.57 kΩ
• D. 43.2 V, 20.57 kΩ