Put the sentences below in the correct order to make a main body paragraph. Which is the topic sentence? Which sentences support it?

Put the sentences below in the correct order to make a main body paragraph. Which is the topic sentence? Which sentences support it?
A We can communicate with people whenever we need to, for example, via instant messaging or email.
В This, of course, saves us a lot of time and effort.
С In the first place, computers make our daily lives easier.
D In addition to this, we can find information, pictures, services and other resources on the Internet very quickly and easily.