PLEASE HELP PLEASE!! which of these had these had the greatest long term effect on american indians in the west?

A. the spread of disease
B. the discovery of prairie dogs
C. the drawing of maps
D. the discovery of mountain passes

Use your vocabulary words to complete the sentences below. australia and new zealand are in nature meaning they are located between temperate and tropical climates. oceania, on the other hand, has a tropical climate with numerous island chains, many of which are home to , which are islands made from coral. this entire region rests on the edges of plates, and therefore they are prone to earthquakes, volcanoes, and tsunamis. since most of the islands were formed from volcanoes, rock can be found everywhere.