IN: Which person is it?
The rock melted in the lava because it was pushed.

OPTIONS:
- The rock
- the lava
OUT: The rock

IN: Which person is they?
Seagate recently announced to their investors that production will not go back to normal until the end of 2012 because they had their factories flooded last month.

OPTIONS:
- Seagate
- their investors
OUT: Seagate

IN: Which person is they?
Males always outnumber females at Comic Con since they are generally more interested in games and comics.

OPTIONS:
- Males
- females
OUT: Males

IN: Which person is he?
Mark tackled the quarterback, but he managed to complete the pass.

OPTIONS:
- Mark
- the quarterback
OUT:
the quarterback