(A) propaganda
(B) sussex pledge
(C) espionage
(D) ** war bonds
EXPLANATIONS BELOW
Concept note-1: -Understanding War Bonds A war bond is a debt instrument issued by a government as a means of borrowing money to finance its defense initiatives and military efforts during times of war. A war bond is essentially a loan to a government.
Concept note-2: -Defence initiatives can be financed with the aid of war bonds which can be understood to be loans made to the government. Originally, they were called defence bonds and first appeared in 1917 in the form of Liberty Bonds which were used to help finance the American government’s participation in the First World War.
Concept note-3: -War Bonds: War Bonds are issued by any government to raise funds in cases of war.
Concept note-4: -War bonds are sold at less than face value, and buyers receive the full face value plus interest upon maturity.