As Soon as a Doctor Has Determines a Person Meets

As soon as a doctor has determines a person meets the criteria for brain death, the person is declared dead. True or False?

A) False, because the person may yet be used for organ transplants.
B) True, once a doctor determines brain death, a person is declared dead.
C) False, two different doctors must determine this, and the tests must be run at least twice, a few hours apart.
D) True, it's important to determine death as quickly as possible in order to figure out what caused it.
E) False, two different doctors must determine this in order to use the person for organ transplants.