Which of the Following Changes Will Have the MOST Global

Which of the following changes will have the MOST global effect on coral reefs despite their particular geographic location in the oceans?

A) increased water temperatures from anthropogenic CO₂ emissions
B) increased salinity from desalination of ocean water for human use
C) increased oxygen concentrations from algal blooms due to nutrient pollution
D) increased predation of native coral reef fish by non-native lionfish
E) increased sediment pollution from clear-cut inland forests that smother reefs