(A) a system of fortifications
(B) “out wait” the opponent
(C) ** surprise and overwhelming force
(D) ability to make a long, steady advance
EXPLANATIONS BELOW
Concept note-1: -Blitzkrieg is a term used to describe a method of offensive warfare designed to strike a swift, focused blow at an enemy using mobile, maneuverable forces, including armored tanks and air support. Such an attack ideally leads to a quick victory, limiting the loss of soldiers and artillery.
Concept note-2: -Radio communications were the key to effective Blitzkrieg operations, enabling commanders to coordinate the advance and keep the enemy off balance. These techniques were used to great effect in 1939, when the Polish Army was destroyed in a series of encirclement battles.