To Achieve a High-Quality Single Crystal of a Protein, the Solvent

Multiple Choice

To achieve a high-quality single crystal of a protein, the solvent needs to be removed by _________.
I. boiling it off
II. slowly evaporating it
III. slowly diffusing it through a microdialysis membrane
IV. centrifuging it

A) I and II
B) II and III
C) I, III, and IV
D) II and IV
E) none of the above