Sorry answering this late but yes your answer is correct! C
The correct answer is: "The speech convinced Americans that the USSR was an enemy, rather than an ally, which led to the creation of the Truman Doctrine".
The speech pronounced by the UK president Winston Churchill tried to condemn the URSS policies and to call to action to the other former Ally Countries in order to combat its expansion.
It gave rise to the Truman Doctrine, an US foreign policy approved in 1947 that was designed with the purpouse of limiting the expansion of URSS, during the Cold War era. It tried to spoil the Soviet objectives without direct military interventions.
Made production faster by creating new machinery and creating ways to automate other product manufacturing
Hernán Cortés killed Montezuma and defeated the Aztecs
I'm sorry to say these but there are nothing on there so I can't answers this
