What Are the Two Problems That Override All Other Problems

What are the two problems that override all other problems in the Everglades today?

A) The Everglades receives too little water, and the water it receives is polluted with nutrient minerals from agricultural runoff
B) The Everglades has too many foreign species crowding out natives, and as a National Park cannot expand in size.
C) The Everglades receives too much water, and the water it receives comes in destructive floods due to breeches in the levee system.
D) Urban growth and expansion of agriculture into the southernmost areas are responsible for loss of biodiversity in the area.
E) The Everglades depends on the Florida aquifer for clean, fresh water, however that water is being diverted to golf courses and the aquifer is running dry.