Who is the antagonist in a story? A.
the main character
B.
the character who is a stand-in for the audience
C.
a supporting character who develops the main character
D.
a character who acts in opposition to the main character

its d.

Explanation:

a protagonist is the main character, often a hero/ a good character with good motives and the antagonist is the character who opposes the protagonist, often a villain. hope this helped

mark twain, real name samuel langhorne clemens, was an american writer, humorist, entrepreneur, publisher, and lecturer. among his novels are the adventures of tom sawyer and its sequel, the adventures of huckleberry finn, the latter often called "the great american novel". wikipedia