(1)The most catastrophic natural disaster in the United States was a category 4 or extreme, hurricane that struck Galveston, Texas, on September 8, 1900.(2) A 15-foot storm surge killed more than 8,000 people on the low-lying island.(3) In a effort to prevent a similar disaster in the future, the island's elevation was raised farther above sea level(4)Workers also constructed a sea wall to try to protect the city.

Which sentence gives the main idea of the selection ?
A.Sentence 1
B.Sentence 2***
C.Sentence 3
D.Sentence 4

Which sentence mostly closely supports the main idea with

Question

(1)The most catastrophic natural disaster in the United States was a category 4 or extreme, hurricane that struck Galveston, Texas, on September 8, 1900.(2) A 15-foot storm surge killed more than 8,000 people on the low-lying island.(3) In a effort to prevent a similar disaster in the future, the island's elevation was raised farther above sea level(4)Workers also constructed a sea wall to try to protect the city. 

Which sentence gives the main idea of the selection ? 
A.Sentence 1 
B.Sentence 2*** 
C.Sentence 3 
D.Sentence 4 

Which sentence mostly closely supports the main idea with