TOEFL Reading: ETS-TOEFL阅读机经 - 8NT534D16JK1MP74L$

According to paragraph 6, all of the following are theorized to have occurred as a result of volcanic activity EXCEPT A. a decrease in the amount of sunlight reaching Earth's surface B. a reduction in the number of sulfate aerosol veils in the stratosphere C. increased dryness in some areas that were once more humid D. changes in the atmosphere's composition resulting in an increase in temperature