What are the affixes of inflexible and polymorphous?

Not flexible; incapable of or resistant to being bent; rigid:an inflexible steel rod.2.of a rigid or unyielding temper, purpose, will, etc.; immovable:an inflexible determination.3.not permitting change or variation; unalterable:inflexible rules.

having, assuming, or passing through many or various forms, stages, or the like.2.polymorphic.Origin of polymorphous

The right answer for the question that is being asked and shown above is that: " d. prospective payment system." To contain costs, Medicare replaced the old payment system with a  prospective payment system, which sets a price for every service based on expected costs.