The Gulf of Tonkin Resolution was repealed in 1970 because it gave too much power to the president.
• lowered the voting age to eighteen.
O resulted in the removal of US troops from Vietnam.
• prevented the president from committing US forces as he saw fit.

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.

d is the right answer

b europeans take corn to africa. corn becomes an important crop there.