Question

What is the difference between a monologue and a soliloquy?
A.
Monologue is another name for soliloquy.
B.
Monologues and soliloquies are only used during battle scenes.
C.
A monologue is a lengthy speech given by a character in the presence of other characters on stage. A soliloquy is a speech given by a character when s/he is alone on stage.
D.
A monologue is a speech given by a character when s/he is alone on stage. A soliloquy is a lengthy speech given by a character in the presence of other characters on stage.