Relative to Glacial Mass Balance,which of the Following Is Correct

Multiple Choice

Relative to glacial mass balance,which of the following is correct?

A) a positive net balance occurs during a cold period,and a negative net balance occurs during a warm period.
B) glacial mass is increased by evaporation,sublimation,and deflation.
C) glacial mass is increased by a combination of processes called ablation.
D) worldwide,most glaciers are showing marked net increase in mass at present.
E) where the balance is zero,the ice advances.