b) Mexico was the reason Manifest destiny was unable to reach their goal of reaching the pacific. This is why Mexico did not want to sell California. People realized the only way that they would reach the pacific is if they took California because Mexico would be left with less power. By the end Mexico lost almost half of its land.
c) You could also use Manifest destiny to support the views from this document. This war was made to get back California from Mexico. Americans knew that if Mexico did not give up