The answer:
Territorial expansion
The Santa Fe trails were used during winter and the Oregon trail was used for immigration.
16) B
17) C
18) B
19) A
20) C?
21) D
22) A
23) I’m not sure, maybe B?
24) A
25) C
26) B
Massive gatherings of anti-war demonstrators helped bring attention to the public resentment of U.S. involvement in Vietnam. The confrontation seen above took place at the Pentagon in 1967. Despite the growing antiwar movement, a silent majority of Americans still supported the Vietnam effort.
