What does hibernate do?

One of the selections on the shutdown selection on a laptop is “hibernate.” What does the hibernate option actually do?

A) CPU execution is halted but power continues to be provided to both CPU and memory.

B) All active processes are stopped and only RAM is powered.

C) The contents of memory are saved to disk and all power is halted.

D) The operating system shuts down, clears itself from memory, and the laptop powers off.