Sami Baker Is Hired by an Office as a Clerk

Sami Baker is hired by an office as a clerk. She is put on probation for three months. Her employer is concerned that she is not "getting it", but he offers her permanent employment. He makes it clear to her, however, that her performance will have to improve. Sami's work is still poor, but her boss says nothing further to her until, about three months later. At that time she makes a particularly serious mistake so he fires her on the spot. Which of the following statements is TRUE?

A) Incompetence is cause for dismissal without notice.
B) It was a condition in Sami's employment contract that her performance improves and since it didn't, her boss was justified in firing her.
C) Sami was entitled to formal notice and an opportunity to improve her work.
D) Since the employer did nothing in response to Sami's incompetence, he approved of it
E) Both C and D