If John enters into a contract with Jane, who is signing as an authorized agent of XYZ$,$ Inc., but John does not know that Jane is acting as an

agent, then, if the contract is breached:

Only Jane is liable for the contract because XYZ$,$ Inc. is an undisclosed principal

$xYZ,$ Inc. and Jane are both liable for this contract because XYZ$,$ Inc. is an undisclosed principal

Only XYZ$,$ Inc. is liable for the contract because Jane was acting on its behalf when signing

Only XYZ$,$ Inc. is liable for the contract because it is an authorized act by a duly appointed agent