D the Spanish destroyed the culture and took the gold from the Native Americans the natives were used as slaves and abused
There have been 20 presidents since 1900
A. is a duty of congress. They can say a law is unconstitutional based in their views on the law but they cant declare one unconstitutional. But the President can declare a law unconstitutional and change it.
A patent is an exclusive right granted by country to allow the inventor to exclude others from making, using or selling their invention in that country during the life of the patent.
The 3 great empires were the Mughal, Ottoman, and the Safavid empire.