YouplantoimplementHyper-Vvirtualizationtotestapplications.Inthetestenvironment，youwilltakefrequentsnapshotsofvirtualmachines（VMs）.YouneedtorecommendwhichdisktypesyoushouldusefortheplanneddeploymentoftheVMs.Whichdisktypesshouldyourecommend？（）

A.pass-through

B.fixed-size

C.differencing

D.dynamicallyexpanding