Which statement about the employment contract is CORRECT？A．Doctor"s note is not necessary

Which statement about the employment contract is CORRECT？

A．Doctor"s note is not necessary for a one-day sick leave.

B．Some employees used to take advantage of its loopholes.

C．All the terms in it are preferred to the candidate.

D．Paternity leave is as long as maternity leave when the first child is born.

请帮忙给出正确答案和分析，谢谢！