An example of an internal disaster that may result in a threat to hospital information systems is ________.

Group of answer choices
A. repeated power outages due to stress on the power grid during a heat wave
B. a caller telling a hospital operator that a bomb has been placed in the IT department
C.a disgruntled employee threatening a violent retaliation if employment is terminated
D.a large spill of toxic chemicals leaking into areas where data storage occurs