Answer:
Life on the trail was not easy. Many faced family deaths to sicknesses such as cholera, measles, and smallpox. Starvation, harsh weather conditions, and travel accidents were common and took their toll, no matter which trail pioneers chose to travel or how carefully they prepared
Explanation: Hope this helps
they were interested in the fur trade more than anything else
The correct answer is b. passing ex post facto laws.
Ex post facto laws are those that retroactively change the rules of evidence in a criminal case and increase the punishment of a crime that was legal when committed. This is a violation of Article 1 Section 10 clause 1 of the constitution