All of the Following Are TRUE for Activities and Activity

All of the following are TRUE for activities and activity coefficients,except:

A) activity for a chemical species is the product of concentration and activity coefficient.
B) the activity coefficient corrects for non-ideal behavior due to ionic strength.
C) as ionic strength increases,the value of the activity coefficient increases.
D) for ions,the activity coefficient approaches unity as the ionic strength approaches 0.
E) the activity coefficient for neutral molecules is approximately unity when the ionic strength is less than 0.1 M.