Which of the Following Is True in Case of Death

Which of the following is true in case of death or incompetence of a customer?

A) A bank cannot pay checks of a deceased customer until it has notice of the customer's death.
B) If a bank knows of a customer's death,it can pay checks written by the customer prior to his/her death,for a period of 30 days.
C) The deceased person's heirs or other persons claiming an interest in the account can order the bank to stop payment.
D) A bank can declare checks signed by the customer while he/she was alive,as null and void.