Precipitates Will Often Contain Impurities and Will Require Treatment to Remove

Precipitates will often contain impurities and will require treatment to remove impurities.Which of the following precipitation terms is INCORRECTLY defined?

A) gathering - precipitate collects a trace element of the solution
B) masking agent - compound that prevents impurities from reacting with the precipitate
C) inclusion - pocket of impurities trapped within the precipitate
D) digestion - precipitates remains in mother liquor after precipitation to promote slow recrystallization of the product,form larger particles and expel impurities
E) coprecipitation - impurities are precipitated along with the desired product