D: the National Aeronautics and Space Administration (NASA)
Explanation:
NASA played the most role in pushing for the raise of the flag which was later raised by NASA's Neil Armstrong.
It is the antagonist because they are usually looked as an enemy or an opponent and clearly the enemy isn’t a hero, or narrator which leaves us with b and c and b means the same as the hero leaving us with C the antagonist
You have to compare to teacher to something else like: "My teacher is as sneaky as a fox" ; Something like that.