Multi-select problem: How does the next paragraph end?

How to decline a phone call with a text message
Know your options when a call comes in.
When you receive an incoming call, a circle appears on the incoming call screen. Look closely at the options available surrounding that circle, and you'll see that you need not be flustered.

Choices:
(a). If you speak or respond to an incoming call, you always have the option to encourage them to call again if it distracts you and the call hangs up. The letter can't be deleted by syncing them to the number on your iphone.;
(b). Normally, to answer a call, you would slide the circle to the right side of the screen, and to reject the call, you would slide the circle to the left side of the screen. The other option available is to decline the call with a text message.;
(c). Your choices include: unlimited, close, free, cellular, everything, process, etc. Don't answer the call right away.;
(d). If the call is urgent, make sure you know where to ring the keypad. If the call is automated, you won't be able to ensure its urgent relevance, and you'll have to hurry to answer the call.;
(b).