Answer:
a. not be valid because performance of the contract depends on Basil's unique talents and skills as a world-famous chef.
Step-by-step explanation:
Since in the question it is mentioned that there is a contract between the Basil and the Maggie and Basil delegate his duties to Oliver so here the delegation of duties would not be valid as the contract is made between the Basil and Maggie
Therefore in the given case, the contract should not be valid
Hence, the correct option is a.