'Peace through strength' is the idea that military power can secure peace. It is associated with conservative politics and was often used by the former U.S. President Ronald Reagan in the 1980s. More recently it's been used by the current President Donald Trump.
Pact of steel is another term for the Axis Powers but refers only to Italy and Germany
With this definition C would appear to be the answer
The answer for A is they treated them poorly
They either kicked them out of the cities or made them mercenary
The answer for B is They thought the Aztecs were crude barbarians, but were willing to employ them as paid soldiers to fight in another country. The Aztecs were embarrassed, so they eliminated this part of the story.
Answer: Known as the Sun King, Louis XIV centralized power in the monarchy and reigned over a period of unprecedented prosperity in which France became the dominant power in Europe and a leader in the arts and sciences.