Well the only one that is actually a piece of programming is A. Word Processing Program. B, C and D are all peripherals for a computer not actual software for it. Basically if you have to install it on the computer its software. Now B C and D may need software to make them compatible with your computer they themselves dont need to be installed.
This is an opinion question, so it would be kind of hard to answer considering it is supposed to be your opinion. No offense, just saying.
2.16 would be your correct answer or you could refer to the source to actually explain trust me it will help ! the source > coursehero.com