Answer:
C.
by defeating the Spanish Empire and gaining territory
Explanation:
The third part of James k. Polk's war plan was to "1.) to capture Mexico city". This fell outside Polk's usually craving for manifest destiny, which up until then have only been an east-to-west route.
A dutie is something that must be done, A responsibility is something that should be done but is not required.
For example, Our duties as citizens is to pay our taxes. But our responsibilities as citizens is to vote.
Hope this helped.
<span>Compared to earlier presidents, modern presidents are move involved in economic issues.
Many of the previous presidents were not qualified enough or did not have the inclination or the power to be involved in economic issues or deal with them. However, with the modern technologies and developments in the nowadays world, presidents tend to get involved in economic issues.</span>