Question

Which is a complex sentence?

The technician installed my hard drive and turned on my computer.

My computer is lightweight, powerful, and portable.

Both computers are powerful, but this one is less expensive.

After you install the security software, your computer will run smoothly.

Answer 1

D) After you install the security software, your computer will run smoothly

Step-by-step explanation:

Trust me I'm great with computers. ;)

Answer 2

the fourth one because it has a dependent clause and an independent clause