The answer is B) They have continued to improve and are still used today.
Explanation:
During the Second World War there were major technological changes, new instruments, armaments and products were created that are still valid today and work is continuing on their improvement. A clear example would be the development of the first jet plane; and of giant magnitudes which is the ancestor of HERCULES. Another example is the creation of two types of internal combustion rockets which were created by Germany and were called as V-1 and V-2; which were used mainly in English territory.
