The correct answer is going to be C. A Behavior Trait Of All Humans And Animals.
The quote from the Gettysburg Address details how Lincoln used phrases in his speech to remind his listeners of the American ideals of liberty, equality, and the responsibility of government. Lincoln asserts to the people that it is their duty as survivors of fallen soldiers to uphold the ideals that they gave their lives for. Lincoln also cites religion, "...under God..." to support the idea of freedom and liberty for all people. He also defends the idea of the people and government having the responsibility to ensure that the government is representative of the wants and needs of the citizens, "...government of the people, by the people..."
The Ku Klux Klan, founded in the late 1860’s, experiences three major surges in popularity promoting ideals such as white supremacy, white nationalism, Nativism, anti-immigration, and anti-communism.
The first era of Ku Klux Klan experienced a rise in popularity in the late 1800’s with the intent of overthrowing Republican state governments in the South and ensuring that newly-freed southern African Americans did not vote. In 1871 their membership was oppressed by federal law enforcement (1871 Ku Klux Klan Act signed by President Grant to combat the KKK and other white supremacy groups).
The second Ku Klux Klan group flourished nationwide in the 1920’s on the platform of pro-prohibition and anti-Catholicism and anti-Jewish feelings. They experience a diminished population in the late 1920’s (around the time of the Great Depression; a time of mass American economic hardship).
The modern-day third wave of the Ku Klux Klan came about in the late 1950’s opposing the civil rights movement. Current membership, as of 2016, amounts to an estimated 3,000-6,000 active members.
Answer: They used irrigation to bring water to crops and fields.