It can be inferred from the passage that which of the following is true of the surface waters in the current Antarctic environment? A. They are more affected by annual fluctuations in atmospheric temperatures than they would be if they were less salty. B. They are less salty than they would be if global warming were to occur. C. They are more likely to sink and stir up deep waters than they would be if atmospheric temperatures were to increase. D. They are able to offset some of the effects of global warming beyond the Antarctic region. E. They are less affected by the temperature of deep water than they would be if atmospheric temperatures were to increase.