The purpose of any invention is to make our lives better, so good or bad, it depends on the way by which we use these inventions.

A. Whether an invention is good or bad depends on the way by which we use it because the purpose of any invention is to make our lives better.

B. We can use either good or bad inventions to make our lives better.

C. The purpose of any invention, whether good or bad, is to make our lives better. This depends on the way by which we use these inventions.

D. Good or bad as they are, all inventions have the same purpose to make our lives better.