Which of the following is true?

Question $5$ options:

a$)$

Cannot be bound on contracts made by an agent if the principal's identity is not disclosed to the third party.

b$)$

Cannot through ratification be bound on contracts made by an agent.

c$)$

Can be bound on contracts made by an agent even if the principal's identity is not disclosed to the third party.

d$)$

Cannot through ratification be bound on contracts made by an agent, but a principal can be bound on contracts made by an agent even if the principal's identity is not disclosed to the third party.