The Ariane $5$ satellite launch vehicle failed because:

Question $22$ options:

a faulty on$-$board computer caused the other computers in the network to crash repeatedly.

a bad sensor fed faulty information into the flight control computer, causing it to fail.

the rocket's on$-$board computer sent back faulty information to ground control, causing the human controllers to destroy the rocket.

code that worked correctly on the Ariane $4$ failed on the Ariane $5.$