Answer:
D. Disrespect from other nations
Step-by-step explanation:
After the War of 1812, the US had new, strong senses of patriotism as well as nationalism.
There were also new war heroes that emerged, such as Andrew Jackson, who would later become president.
However, disrespect from other nations was not an effect of the War of 1812.
The opposite was actually gained: the US gained lots of respect from other nations and began to be seen as a world power.
So, the correct answer is D. Disrespect from other nations