单项选择题

A.C12H22O11>CO(NH2)2>NaCl>CaCl2
B.CaCl2>NaCl>CO(NH2)2=C12H22O11
C.CaCl2>CO(NH2)2>NaCl>C12H22O11
D.NaCl>C12H22O11=CO(NH2)2>CaCl2