Fusion Is Often Called a "Thermonuclear Reaction" Because

Fusion is often called a "thermonuclear reaction" because

A) it is a nuclear reaction that is self- sustaining a sufficiently high temperatures.
B) it produces nuclear energy.
C) it is a process that converts thermal energy into nuclear energy.
D) it is a nuclear reaction that consumes, or uses, more thermal energy than it creates.
E) it is a nuclear reaction that produces more total energy than it consumes.