Which of the following statements regarding SEP's is NOT ture?

A$.)$Coverage requirements for a SEP include work in three of the last five years.

B$.)$ Part time employees are exempt for coverage requirements. You must work full time to receive SEP contributions.

C$.)$An employer does not have to fund SEP IRAs every year, the contributions are discretionary.

D$.)$The employee is always $100\%$ vested in SEP contributions made to their account.