Which code segments should you use?

You are developing a Windows Store text editor app by using HTML5 and JavaScript.
Users must be able to select text within the app and then copy the text.
You need to enable the copy feature.
Which code segments should you use? (Each correct answer presents part of the solution.
Choose all that apply.)

A.
Option A

B.
Option B

C.
Option C

D.
Option D