What concept or principle requires layered, complementary controls sufficient to detect and deter infiltration and exploitation of an organization, its information systems, and its facilities?

Janice recently received her college degree and is looking for a job. she is worried that since she just finished school, she will be required to repay her perkins and direct subsidized loans immediately. janice pulls out the paperwork she signed and reviews it again for repayment information. after reading all of the information, janice discovers that