In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

Article: How many coins have you got in your pocket right now? Three? Two? or One? With a phonecard you can make up to 200 calls without any change at all. 1. _ Go to a telephone box marked "Phonecard". Put in your card to start, make your call and when you have finished, a screen tells you how much is left on your card. It costs no extra for the cards, and the calls cost 10p per unit, the same as any other pay-phone call. You can buy them in units of 10, 20, 40, 100 or 200. 2. _ Near each phonecard place you will find a shop where you can buy one. They're at bus, train and city tube stations. At many universities, hospitals and clubs, restaurants and gas stations on the highway and shopping centers. At airports and seaports. 3. _ Most broken payphones are like that because they've been damaged. There are no coins in a cardphone to excite thieves' interest in it. So you're not probably to find a broken one. Get a phonecard yourself and try it out. Or get a bigger wallet.
Question: The passage is most probably _ .
Options: (A) a warning (B) a notice (C) an advertisement (D) an announcement
C