The moisture equilibrium chart can be used to determine the（）.

A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium exists

B.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodity

C.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargo

D.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo