For maximum power transfer to occur, what value resistor should the 8kΩ resistor be replaced with?
a) The 8kΩ resistor should be replaced with a 8kΩ resistor
b) The 8kΩ resistor should be replaced with a 4kΩ resistor
c) The 8kΩ resistor should be replaced with a 16kΩ resistor
d) The 8kΩ resistor should be replaced with a 12kΩ resistor