Which of the following explains the connection between the ability Americans to gain access to natural resources in early 1800s in the late 1800s

a) In both. The expansion of power over western north America gave the US control over more natural resources

b) Both. The US import and more natural resources after claiming overseas colonies through the monroe doctrine

c) in both. The United States acquired more natural resources by increasing peaceful trade with American Indian groups

d) in both. The forced migration of enslaved people provided labor for extracting natural resources in the United States mining towns