1. Miniscule mean tiny or extremely small. So therefore, the answer for this question is A.
2. The answer would be A. Since the definition of stereotype is a predetermined notion, particularly about a group of individuals.
3. Clap! Snap! The black crack! is the track sung by the goblins as they run down into Goblin-town after taking Thorin, the dwarves, and Bilbo Baggins. As they chanted they taken out lashes to force the dwarves and the hobbit to get away fast. So therefore, the answer is C.
That's definitely informal because of the contractions used such as "'cause" and "y"all" and also because of the word phrasing such as "chow down" and "totally awesome."