Which would be the BEST topic sentence for the following paragraph?

I can hardly remember what I did before I got my own personal computer. Not only does it improve the quality and efficiency of my homework, the games I play are really cool. I also like to surf the Internet in search of websites about interesting topics such as skateboarding and rollerblading.
A.
Last night I looked for information on Tony Hawk.
B.
My mom and dad never had a computer when they were young.
C.
Having my own computer has made life so much easier and much more fun.
D.
Computer use should be monitored by parents at all times to protect their children.

C. Having my own computer has made life so much easier and much more fun.