I am to make a deceitful promise in circumstances in which my situation is such that I am in real need of money and I know that I will never be able to pay it back in order to further my own personal advantage

I am to make a deceitful promise in circumstances in which my situation is such that I am in real need of money and I know that I will never be able to pay it back in order to further my own personal advantage." Kant claims that the universalization of this maxim results in a contradiction. What does Kant mean?

a) Kant means that a world where everyone makes deceitful promises would be a bad one.

b) Kant means that we cannot imagine a world where everyone makes deceitful promises, because the practice of promising presupposes trust and no one would trust anyone in a world where everyone makes deceitful promises.

c) Kant means that it is pointless to make a deceitful promise.

d) Kant means that it is impossible to conceive of a world in which all promises are offered with the intention of being broken, because a promise will only be accepted if all promises are kept. So, if one promise is broken, none will be accepted.

e) Kant means that on pains of irrationality we must never keep our promises.