Although it$$ isn't very efficient for long passwords that contain uppercase and lowercase$$ letters, numbers, and special$$ characters, a$\_\_\_\_\_\_\_\_$ occurs when a program tries all possible combinations of available characters to determine a password.

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Part $1$

A$.$

brute force password crack

B$.$

$$non$-$heuristic password attack

C$.$

global password attack

D$.$

brute force attack

E$.$

systematic password attack