Write the next sentence in the following story.

How to speak professionally on the phone
Keep a pen and paper next to you.
Keep track of calls by writing down the person's name, the time he or she called, and the reason. It's best to write the information on a phone memo pad with carbon.

Available choices: (a). Draw the bottom line of the memo pad with a pen when it's time to call the other person. Once the other person picks up the phone, write down their phone number and ring it three times to contact them.; (b). Sometimes people will call frequently because they are busy, anxious, impatient, or for other reasons. You can also record the conversation by putting the person's name in bullet points, which you can gather later.; (c). Make it very clear and a little crisp, don't too messy, maybe the person who calls a paper might not think so. Be polite and professional as the person calls you.; (d). This keeps the calls organized in one place, and when it isn't for you, you can give a copy to the intended recipient. Answer the phone in as few rings as possible.;. The answer should be
(d).