Why did scientists prior to 1977 believe that only very basic life does existed in the deep ocean? A. They thought that the currents were too strong.

B. They thought that hydrothermal vents released poisonous gases.

C. They thought that there was no substantial food source.

D. They thought that the temperatures were too cold.

Mark the four statements that are true. 1. the democrats blamed the republicans for the stock market crash of 1929. 2. the democrats won the presidency in the 1990's but lost control of the congress. 3. the democratic party is the oldest political party in the united states. 4. the anti-federalists were one of the first two american political parties; they wanted a strong central government. 5. the "era of good feelings" was a period from 1816-1824 where there was only one political party: the democrat-republicans.