I know the answer is NOT C "During one great period of immigration--between 1891 and 1920--our nation received some 18 million men, women and children from other nations. The hard work of these immigrants helped make our economy the largest in the world."
Efficacy means “capacity for producing a desired result or effect” so i believe the answer would be D.
hope this helps!!
A. Metaphor, because the river of glaring gold light is not directly referring to a glowing river
I would suggest the internet, there are tons of websites out there that contain tons of research regarding tourist sites in Alaska. However, since there are some unreliable sites out there, check out travel magazines and etc with a focus on Alaska that might help you!