A Karate Expert Executes a Swift Blow and Breaks a Cement

A karate expert executes a swift blow and breaks a cement block with her bare hand. The magnitude of the force experienced by her hand is

A) zero.
B) identical to the force applied to the block.
C) less than the force applied to the cement block.
D) more than the force applied to the block.
E) impossible to predict without additional information.