He contributed to the invention of the radio
Answer: D is correct.
Explanation: laws of reason are mere fictions. Philosophy of rights is dedicated to this issue but in its very fundaments there are fundamental questions that are still not answered (becase both laws of nature and laws of reason are products of human intellect, i.e. they cannot be experimentally proved. In spite of its fictitious nature, theese laws became one of the pillars of Enlightenment. French philophers, for example, attempted to ground ethics on mathematics which proved to be inviable.
It gave the Allies the advantage to win the war
It’s B
The Berlin Wall was built by the German Democratic Republic during the Cold War to prevent its population from escaping Soviet-controlled East Berlin to West Berlin, which was controlled by the major Western Allies.