The computer could not run the program because it did not have enough memory.

Who is "it" in this prior sentence?
OPTIONS:
- The computer
- the program
The computer
Microsoft discontinued plans for the Courier tablet due to the success of the tablets from Apple, so they have eliminated another competitor in the tablet market.

Who is "they" in this prior sentence?
OPTIONS:
- Microsoft
- Apple
Apple
Mark tackled the quarterback, but he was penalized.

Who is "he" in this prior sentence?
OPTIONS:
- Mark
- the quarterback
Mark