According to the passage, "a regular visitor" is__

单项选择题

Quite a few people frown at the telephone bill, a regular visitor who makes its polite but firm call once a month. Friends frown at it and shake their heads, looking stupidly helpless. The next move that friends make is to swear at the trick the phone company plays with people: letting you use the phone first, encouraging you to use it more, and finally charging you heartlessly. The third move, after swearing, is likely to be picking the phone up and starting a funny long chat with someone somewhere across the whole continent.
The bill, in plain words, is a money collector. Household bills include those for electricity, water, gas, garbage pickup, telephone, and cable TV. Credit card holders find more opportunities to frown because they also have bills from banks and companies that may be located in New York City or Nebraska farmlands. Here is a simple addition: suppose you hold three credit cards, plus household bills, you need to take care of nine regular bills a month. Usually, bills come in on different days, giving you two or three weeks to handle them. You seem to be always receiving bills, and sending out payments. You feel that you live to pay bills.
There are some irregular or long term bills coming for, say, the car insurance, the health insurance, publication subscriptions, first aid, or a fine for something, like a parking violation, that you did or did not deserve. The principle is that whenever your balance in the bank account is going up, you know it is about time for some special bills to arrive for you to pay off. Because bills are part of everyday mail delivery, going to check the mailbox is no longer a matter of pleasant hope.
Some people handle bills in a cool way: forgetting them for a while by throwing them under the couch. Once the bothersome thing has disappeared from you, you tend to stop worrying about it. As a Chinese cynical idiom goes: "The more debts the less concerns.\

According to the passage, "a regular visitor" is______.

A．a friend of the author
B．a telephone operator
C．something which collects money
D．someone who delivers telephone bills