Answer:
change
Explanation:
the clock has a tendency to fall behind by a few minutes, replace tendency with change and it makes sense more than the other options.
Some observers have suggested that the U.S. actually lost more than two dozen battles during Vietnam. But the 10 historians we contacted agreed that most, and possibly all, of the major battles were won by the U.S.
Answer:
During this era the scientific method changed a lot, because the goal was to prove a hypothesis by a logical way. Thus, many improvements were achieved like, technological progress, new civil politics, and the emergence of nations states.
