Context: idk . i feel like , holy crap , what 's everyone 's deal . but i ' m being just as negative as everyone else . sometimes i feel like screaming at everyone , and then i think about it a little bit and i realize it wo n't help me any .
Question: What does idk mean ?
Option 0: I means I 'm done kidding .
Option 1: It means I Dream keenly .
Option 2: It is shorthand for I 'm unsure .
Option 3: None of the above choices .
Answer: 2