The correct answer is B. America
Step-by-step explanation:
In this excerpt, the narrator describes the Land of the Golden Mountain was across the ocean "and traveled over the sea to work in the demon land". Moreover, the narrator explained the father lived in China, this suggests the Golden Mountains are in a different country from Asia. Moreover, the term "Golden Mountain" and the idea "There was plenty of money" suggests this location is in California (the United States, America) and the mountains are "golden" because of the gold rush in this area during the mid-nineteenth century. According to this term refers to America.