It's a redundant sentence because it does not need to say "over and over" and "and repeated it. Also those two phrases are double negatives. It could also be called a run on sentence.
The following are context clues phrases in the passage examples and syntax
Answer:
D) disease
Explanation:
Numerous tribes were wiped out by constant warfare and epidemic disease. Simultaneously, trade with Europeans attracted the Indians, enabling them to acquire valuable new products such as guns, steel hatchets, cloth, and kettles. The fur trade, in particular, boosted the strength and aggression of numerous tribes.
