Answer: A
Explanation: Because there were overhead spacial objects with telecommunications in Russia, the US military feared that Sputnik could be used to issue ballistic missles or in warfare. In doing so the US began to develope a system for anti-ballistic missle defense. Long range missle weaponry existed before the Cold-War.
One significant indication that the European feudal system was effective was that "<span>Similar systems developed in China and Japan" although it should be noted that this isn't enough evidence to prove that it was economically successful.</span>
<span>D. It launched a new era of cooperation between Catholics and non-Catholics. </span>
