Answer:
Klondike gold rush of the 1890s
The Call of the Wild is set in the midst of the Klondike gold rush of the 1890s. During this time, more than 30,000 people traveled to the area near the convergence of the Klondike and Yukon rivers in Yukon territory, just east of what is today Alaska.
Explanation:
Nimbused basically means surrounded. "They were nimbused <span>by the last light of a sun that had set"
So a synonym could be engulfed or surrounded.
Hope that helps!</span>
I'm thinking the answer is C, hope this helps!