What Do Unmanned Systems Offer to Democracies in Battlefields

What do unmanned systems offer to democracies in battlefields?

A) The ability to spy on everyone and stop perceived crimes, whether or not a crime is actually going on.
B) The spread of democracy; they can eliminate opponents to democratic systems to enforce the democratic governments.
C) They offer the end of casualties on our own turf because with unmanned systems we can keep all the casualties in the Middle East.
D) Distinct casualty aversion because they are said to protect troops not merely by distancing but by removing them from the battlefield.