That statement IS arguable because not everyone would agree and also NOT defensible since theres no proof to back it up with, so the answer would be (D)
Answer: D. it lies in a valley, surrounded by mountains, that traps in air pollutants over the city.
Explanation: Being in a valley results in air pollution being contained to an area.
ANSWER: The US and Cuba were in non-physical conflict during the 60's. The main most important event going on around this time period was The Cold War. America desired to prevent the Spread of Communism without going into actual war. Cuba finally converted to Communism in the 60's after it's years of civil problems, concerning the United States.
SHORT FACTS:
-The US made an attempt to frame Cuba in order to gain reason for taking action
-The action failed, causing an almost nuclear war between Russia, US, and Cuba
Hope this Helps!
The Precambrian eon is separated from the Phanerozoic eon in the fossil record because of poorer record of fossils than that of the succeeding Phanerozoic eon.This is because many Precambrian rocks have been heavily metamorphosed,obscuring their origins,while others have been destroyed by erosion,or remain deeply buried beneath Phanerozoic strata.The Phanerozoic Eon covers 541 years to the present while Precambrian Eon covers 4.6 billion years.
