What were the causes of the mexican-american war? what was the course of the conflict and the results? 15

The Mexican-American war was a conflict between the United states and Mexico, fought from April 1846 to February 1848. ... It stemmed from the annexation of the republic of Texas by the U.S. in 1845 and from a dispute over whether Texas ended at the Nueces River ( The Mexican Claim) or the Rio Grande ( the U.S. claim).

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.

your answer would be (b)