【单选题】

Questions 141-143 refer to the following notice.

Thank you for becoming a KoreaBank credit card customer.Enclosed is your new credit carD、Before using your card, please thoroughly read the enclosed documents (141) your rights and responsibilities as a KoreaBank credit card user. if you have any further questions, call 255-HELP. To activate your card, call 255-HELP to confirm that you have received your carD、Your card will not be valid for use (142) you call this number.
In an (143) event of loss or theft, please call 255-LOST immediately. Thanks.
A、unlikely
B、doubtful
C、defective
D、rigorous