Answer:
he Lincoln Douglas Debates were a series of seven public discussions held in 1858 between Abraham Lincoln and Stephen Douglas as they contested the Illinois Senate seat. Lincoln was the Republican Party candidate and Senator Douglas was the incumbent Democratic Party candidate. The debates concerned the issue of slavery and its extension into territories such as Kansas. The Lincoln Douglas debates transformed Abraham Lincoln into a national figure and led to his election to the presidency in 1860.
Explanation:
The answer is C, Red River and Arkansas River.
The USSR and other Warsaw pact nations invaded
The correct option is D. Volcanic eruption released large amounts of water vapor into Earth's early atmosphere.
Earth’s first atmosphere had lots of water vapor but it almost lacked oxygen. Eventually, frequent volcanic eruptions put several different gases into the air. These gases created a new type of atmosphere for Earth. The volcanic eruptions spewed gases such as nitrogen, carbon dioxide, hydrogen, and water vapor into the atmosphere, but no free oxygen. Without oxygen, there could not be life on Earth.
