John works as a sales representative with Northwind Traders. He has to make a presentation to his customers in another town. The presentation occupies 10 gigabytes (GB) on his computer. He wants to make some final changes to this presentation while he is traveling.
Which of the following types of computers will help John carry this data with him?

A. Mainframe
B. Personal digital assistant (PDA)
C. Laptop
D. Desktop computer