Over 60 countries in South America
Answer:
Made the constitution and made it to where the ruler of the US could only serve a few years
In 1939, Albert Einstein wrote a letter to president Roosevelt alerting him to " a new and important source of energy" which was then developed by scientists in the United States.
Albert Einstein is the correct answer. Let me know if you have any more questions :)
In the 1970s, Gerald Ford was the Vice President for Richard Nixon, and he later would take over for Nixon after Nixon resigns.
Answer C is correct