Advertising is different from other forms of communication in that the advertisers pay for the message to be delivered.
【正确答案】 B
【答案解析】解析:根据上下文可知,“communication”在句中的意思是“交际”;“in that”的意思是“因为”;“pay for”通常有两层意思:“为…支付费用”,或者“为…付出代价”,根据本句话的上下文,应理解为前者。