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

How to leave the perfect voicemail message
Use the right tone of voice.
As soon as you begin recording your message, speak in a clear, audible voice. Don't mutter or talk too fast.

pick from the following.
a). Try your best to sound interested and energetic to engage your listener's attention. Even though the recipient can't see you, your general tone will come across over the phone, so make sure you're conveying the right one..
b). Sentences that end in a " 12 " sound tend to make your voicemail streaky. Use regular numbers, such as 777..
c). Stressing out your voice will greatly throw off the audio recorder. Limit your voice to tones such as : High: this is the tone you want..
d). Speaking too slow or rapidly makes your voice sound like you are pressing down on the home button. Give a sincere tone of voice even if you speak in a quiet voice..
a).