Vicky is acting as Kevins agent in negotiating an important business deal with Carl. Carl knows that Vicky is acting on Keven's behalf and as his agent, Vicky agreed only to the terms Kevin gave her the authority to agree to, and Carl agreed to the terms. Later, Carl became upset that the contract wasn't being properly upheld. Whom may Carl hold responsible for any breach in the contract?

 

Answer:

Carl can only hold Kelvins responsible for any contract breach.

Step-by-step explanation

For contracts made, an agent is not normally liable; the principal is liable. However, whether it is undisclosed or partly revealed, whether the agent violates or exceeds the authority of the agent, or, of course, if the agent has entered into the contract in a personal capacity, the agent may be liable.

For this case 
Vicky is only working on behalf of Kevin, or as an agent and he has not made a decision on his own. He agreed only to those terms and conditions which Kevin had granted him authority over. Therefore, only Kevin, not Vicky, will be held liable for any violation of the contract or any issue that occurs. Vicky was actually an agent or mediator. He has no right, on his own, to make any decisions.
If the contract is not properly managed due to any Vicky error, such as inappropriate contact with Kevin, irresponsibility as an acting agent towards assigned jobs, etc. then Vicky will be called liable for action otherwise the contract is officially between Kevin and Carl. They are liable to take action against each other.