Ima go with A because it can’t be India and if not it could be C
Answer:
the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life
Explanation:
There are many steps that people took to end the racial caste system in the United States, but I think putting blacks into the schools was definitely a step in the right direction. ( I don't know if this what you wanted) Also, In India, there actually was a stronger caste system than in the United States but thanks to Muhammad Gandhi it now doesn't exist. He would dress up in the lower classes clothes and live in their villages which forced people to look at the lower class and to see what was going on around them.
Magellan Elcano or Ferdinand Magellan
Following this news, many people feared the world was on the brink of nuclear war. However, disaster was avoided when the U.S. agreed to Soviet leader Nikita Khrushchev's (1894-1971) offer to remove the Cuban missiles in exchange for the U.S. promising not to invade Cuba.