Of the examples listed, which event is thought by scientists to have led to the greatest extinction?
A B C D
a volcano in Hawaii erupting the construction of the Hoover Dam whalers of the 17th, 18th, and 19th centuries the Mississippi River flooding its banks each summer
Question: Of the examples listed, which event is thought by scientists to have led to the greatest extinction?
(A) a volcano in Hawaii erupting
(B) the construction of the Hoover Dam
(C) whalers of the 17th, 18th, and 19th centuries
(D) the Mississippi River flooding its banks each summer

Answer: (C) whalers of the 17th, 18th, and 19th centuries
Answer: (D) the Mississippi River flooding its banks each summer
Question: Of the examples listed, which event is thought by scientists to have led to the greatest extinction?
(A) a volcano in Hawaii erupting
(B) the construction of the Hoover Dam
(C) whalers of the 17th, 18th, and 19th centuries
(D) the Mississippi River flooding its banks each summer
Answer: (C) whalers of the 17th, 18th, and 19th centuries