(A) Arctic sea ice has been melt- ing at break-neck speeds in the past few decades, driven by warming air temperature, warming ocean water temper- ature, all of which are caused by or accelerated by manmade climate change.
(B) But there are other factors at play in the decline of ice in the Arctic Ocean.
(C) Sea ice is generally moderated by sunlight.
(D) Warm ocean currents travel north from the equator and usher in warmer and warmer water, making sea ice growth difficult.
(E) It grows in the winter and melts in the summer.
(F) Weather patterns over the high mid-latitudes and the Arctic can also affect sea ice growth.
Which of the following should be the fourth sentence after rearrangement?