Answer:
C: Woods made it possible for moving trains to use telegraphs.
The end of the cold war made the reunification of Germany possible. The unification in 1990 involved, the German Democratic Republic which became part of Federal Republic of Germany after Berlin reunited to a single city.
The fall of the Berlin wall, Helmut Kohl's initiative, and the international corporation between Soviet Union, Western Europe, and the United States made it possible for the unification of Germany, which further encouraged peaceful negotiation that brought the cold war to an end.
The answer to number one is True
President Lyndon B. Johnson announces that he has ordered an increase in U.S. military forces in Vietnam, from the present 75,000 to 125,000. ... This decision to send more troops was regarded as a major turning point, as it effectively guaranteed U.S. military leaders a blank check to pursue the war.