The mars climate orbiter crashed on the surface of mars because
a. one program output thrust in terms of foot-pounds, and another program expected thrust to be expressed in terms of newtons.
b. the probe lost contact with the jet propulsion laboratory when it entered the martian atmosphere.
c. before programmers went on strike at subcontractor lockheed martin, one of them sabotaged the flight control software.
d. a bug in the computer program caused the vehicle to consume too much fuel on the way to mars, leaving an inadequate supply for landing.
e. the extreme cold of deep space caused the computer to crash.