Which of the following best states how the idea of manifest destiny contributed to the causes of the mexican-american war?
a mexico’s claim to texas stood in the way of american expansion to the pacific ocean.
b mexico attacked american soldiers while they were retreating from texas.
c the united states stood in the way of mexico’s desire to expand to the pacific ocean.
d the united states attacked mexican soldiers while trying to reclaim texas.

Manifest Destiny is a political doctrine and belief based on some kind of God's plan for the inevitability and necessity of spreading the United States across the entire North American continent. This need stemmed from the belief that the values ​​and principles of democracy should be pursued on the continent, which is shaped through this manifest. Thus, the Mexico's claim to  Texas stood as an obstacle to the implementation of God's plan and values of democracy according to the manifest.

The answer is: a.

right, but what is the question though? what do you need with?