In this task, you are given a question containing a blank (_) and two options. You should pick the best option to answer the question. Please answer with "A" or "B".

I don't know why I used paper to write my essay instead of computer, it's convenient to edit on the _ . (A) paper (B) computer
B

The spreadsheet at the investing business had to be redone because the _ was focused on accuracy. (A) spreadsheet (B) business
B

She decided to spend her savings on a laptop instead of a smartphone, because the _ has more functions. (A) laptop (B) smartphone
A