Why did New Orleans suffer extreme flooding as a result of Hurricane Katrina? Choose all answers that are correct. A. No one knew that the city’s levees needed to be strengthened. B. The walls built to keep water out of the city failed when lake waters rose rapidly. C. More than 50% of New Orleans’s neighborhoods are at or below sea level. D. New Orleans had no defenses against storms and flood waters.

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Explanation:

New Orleans is a city more vulnerable than most when it comes to storm surges. There are two main reasons for this. The first reason is New Orleans' low elevation in relation to sea level, the second reason is the lack of nature's best defense against a storm surge; wetlands and barrier islands

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

what are the others?