__________ testing is a straightforward testing technique that looks for vulnerabilities in a program or protocol by feeding random input to the program or a network running the protocol.

Excel offers ________ tools, which range from basic to very sophisticated, to help you project future results based on past performance

Fill in the blank(s) with correct word

The ________ on a computer is the master user account that has the authority to add new users

A) lead user B) supervisor C) administrator D) executive