If a user's mental model of an interactive system is incomplete or contradictory,

If a user’s mental model of an interactive system is incomplete or contradictory,

If a user’s mental model of an interactive system is incomplete or contradictory,
A . then the user cannot easily use the interactive system.
B. then the user can still easily use the interactive system.
C. then the user will have to learn to easily use the interactive system.

Answer: A