A Strong Negative Index for the North Atlantic Oscillation (NAO)usually

Multiple Choice

A strong negative index for the North Atlantic Oscillation (NAO) usually means that there is ________ of a pressure difference between the Bermuda (subtropical) high and the Icelandic low pressure.This brings _____________ than average temperatures over the northern U.S.
And northwest Europe

A) less, cooler.
B) less, warmer.
C) greater, cooler.
D) greater, warmer.