Shipping Dispatch, LLC$,$ provides its employees with an e$-$mail system. The company notifies them that it will monitor their communications over the system. Some employees file a suit against their employer, claiming a violation of privacy. The court is most likely to hold that, with respect to communications over the e$-$mail system,

a$.$ the employees did not have a reasonable expectation of privacy.

b$.$ the employer violated the employees' privacy rights.

c$.$ federal law prohibits the employer's "intentional interception."

d$.$ federal law prohibits the employees' privacy claim.