Because they can build something for everyone not just help poor lazy people this benifits everyone in stead of a single group of people
<span>Westward expansion led to loss of life and territory for Native Americans and added to the growing conflict between "free" and "slave" states before the Civil War.</span>
The answer is B. Partisanship.
Partisanship is basically political bias; a party is in favor of a specific cause/event. Therefore, when elected officials support the policies and programs of their own party, they're engaging in partisanship.
Mark that person as as BRAINLIEST