Answer: Adverse selection
Step-by-step explanation: In simple words, adverse selection refers to an insurance problem in which the buyer and seller of the insurance do not have same information. This occurs when the buyer deliberately hide some material facts from the insurance company.
In the given case, The company is charging more from new customers because they have perception that they take their services only when it is highly probable they have to use that.
Hence from the above we can conclude that the correct option is B.