Polk wanted to push Mexico into negotiating with the USA. He did not expect Mexico to put up such a fight.
If there is a general favor towards certain people, if he were to select otherwise, then people would think he was biased. This would result in a bad reputation towards him, with a worst case leading to him being impeached if the public sees enough corruption.
Answer: i think it was called atmospheric steam engine
It's D. Contextualization is when you read or analyse something keeping in mind cultures or traditions unfamiliar to the present time.