The Prosthetic Technologies That Enable Leg Amputees to Participate in Running

The prosthetic technologies that enable leg amputees to participate in running sports are

A) too expensive to be acquired by most people with leg amputations.
B) funded by the U.S.military and available to anyone who qualifies for food stamps.
C) generally provided by charitable organizations serving people with a disability.
D) now manufactured with lifetime warranties and replacement guarantees.