Mckinley,as an Agent,entered into a Contract with Kazumi on Behalf

Mckinley,as an agent,entered into a contract with Kazumi on behalf of Adley,but without having obtained Adley's authority.Which of the following statements is true in this situation?

A) Adley,the principal,is not bound nor is the agent Mckinley bound by the contract.
B) Adley,the principal,is bound,and the agent Mckinley may be personally liable.
C) Adley,the principal,is not bound,but the agent Mckinley may personally liable.
D) Neither Adley,the principal,nor the agent Mckinley is bound if the contract is oral; but if the contract is written,both Adley and Mckinley are bound.