Which of the Following Is NOT a Consequence That We $\circ$

Which of the following is NOT a consequence that we are seeing now?

A) 20 of the hottest years on record have occured since 1980.
B) Arctic sea ice has approximately 50% of its thickness compared to 30 years ago.
C) During the last century, global average temperature has increased by 0.6 ^$\circ$ C.
D) Coral reefs are bleaching due to increased ocean temperatures.
E) All of these statements are true.