Which statement is true?

✂️ a) As a modal, "dare" exhibits normal time reference.

✂️ b) As a modal auxiliary, "need" has no tense contrast.

✂️ c) The "to" is obligatory following "ought" in ellipsis.

✂️ d) The idiom "be to" can follow other verbs in the verb phrase.

✂️ e) "Would rather" has a meaning of ?advisability?.

Responda: Which statement is true?