I believe the answer would be C, burning fossil fuels. Oil and gas is made up of the remains of microscopic plankton. Over millions of years the remains become the carbon-rich coal, oil and gas we can use as fuel. When fossil fuels are burned they release carbon dioxide into the atmosphere, thus contributes to global warming.
The answer is A) concentrated within a small upper class
D. The Spanish-American War resulted in all these territories becoming under the United States.
Here to help! If you were a farmer or a trader, your spot on the hierarchy was rather low. If you were a rich landlord your spot was rather high and you had a lot of money. Hope this helped!!
