Can an agreement to settle out of court have valid consideration?

a.) No, because the party who would have won at trial gained no benefit from the settlement

b.) No, because the party who would have lost at trial gained no benefits from the settlement

c.) Yes, because both parties gave up their right to be heard by the court

d.) Maybe, but only if the settlement required both parties to pay money to the other

e.) Yes, because parties are free to make any contract terms they bargain for