Electrical charge flows from . . . . . . . . . A. Source to drain B. Drain to source C. Source to ground D. Source to gate

The correct answer is: A. Source to drain.

In a MOSFET, electrical charge flows from the source to the drain. The source is the terminal where the charge carriers enter the device, and the drain is the terminal where they leave. The gate is a control electrode that modulates the flow of charge between the source and drain.

The other options are incorrect because they do not represent the correct flow of charge in a MOSFET. Option B, drain to