Which of the following password types is easier to remember than a complex password while still being harder to attack?

A. static
B. one-time
C. passphrase
D. graphical

C
Explanation: This password type requires that a long phrase be used. Because of the password's length, it is easier to remember but much harder to attack, both of which are definite advantages. Incorporating upper- and lower-case letters, numbers, and special characters in this type of password can significantly increase authentication security.