Answer:
. d. the objective theory of contracts.
Explanation:
the objective theory of contracts is applied to contract cases in determining if a contract exists between two parties based on if there is good reason to belief there is an agreement that is a contract that has offer and acceptance and is therefore binding. Under objective theory of contract, parties have to act and perform externally on grounds of the contract as against subjective theory of contracts which is based on internal state of mind and can't easily be determined
