Final answer:
In the context of insurance contracts, consideration can be equal amounts shared between the contracted parties but it's not required to. It does not have to be in currency or certified by the state where the transaction occurs. Therefore, option C is correct.
Step-by-step explanation:
In an insurance contract, the concept known as 'consideration' refers to the exchange of value that takes place between the insured party and the insurer.
This exchange doesn't necessarily have to be in currency or equal. The payment (premium) made by the policyholder to the insurance company is his consideration, while the promise of compensation in case of a loss is the insurer's consideration.
Therefore, the statement that 'Can be equal' is the most accurate, as this exchange can certainly be perceived as equal in terms of legal value, but it's not a requirement. Lastly, the transaction does not have to be certified by the state where it occurs.