The correct answer to the question is option 'D' - All of these.

Explanation:
A contract is a legally binding agreement between two or more parties that creates mutual obligations. In a contract of personal volition, the performance of the contract is based on the personal will or choice of the parties involved. Let's analyze each option to understand why none of them perform the contract.

a) The agent:
An agent is a person who acts on behalf of another person, known as the principal, to perform legal acts or make decisions. In a contract, an agent may negotiate and enter into the contract on behalf of the principal. However, the agent does not perform the contract themselves. They act as a representative of the principal and carry out the obligations as outlined in the contract.

b) The promisee:
The promisee is the party to whom a promise is made in a contract. They are the ones who receive the benefits or consideration promised by the promisor. While the promisee has the right to expect performance from the promisor, they themselves do not perform the contract. Their role is to accept the performance from the promisor and enforce their rights under the contract if necessary.

c) The legal representative:
A legal representative, such as an attorney or guardian, may act on behalf of an individual who lacks the legal capacity to enter into a contract. They have the authority to make decisions and perform legal acts on behalf of the represented individual. However, the legal representative does not perform the contract themselves. They act as a proxy for the represented individual to ensure the contract is valid and enforceable.

d) All of these:
The correct answer is 'D' because none of the options perform the contract of personal volition. The agent, promisee, and legal representative all have specific roles and responsibilities within the contract, but their role is not to perform the contract themselves. They act on behalf of the principal, accept performance, or represent the interests of another individual, respectively.

In conclusion, a contract of personal volition is not performed by the agent, promisee, or legal representative. Their roles are distinct and involve different aspects of the contract, but none of them actually perform the contract themselves.