pirAtED CompACt Disks AnD Floppy Disks rEmAinED thE sEConD BiggEst vEhiClE For thE sprEAD oF ComputEr virusEs DEspitE thE govErnmEnts' DEtErminED EFForts to quAsh soFtwArE pirACy.
A．Boost
B．prEvEnt
C．Crush
D．rEstriCt