Answer:
a. Undisclosed principal bound to perform just as if principal had been fully disclosed at time contract was made
Step-by-step explanation:
"Undisclosed principal" are those which remain hidden from others in disguise.
An undisclosed principal, in an agency law, is a person who negotiates using an agent with the third party. The third party has no clue that the agent is acting or pretending and is not aware of the principal of the agent at the time of contract is made.
Thus the answer is
a. Undisclosed principal bound to perform just as if principal had been fully disclosed at time contract was made.