US war bonds primarily supported the war effort by loaning money to the government, allowing individuals to contribute financially to military expenditures. This initiative fostered patriotism and provided investors with a means to earn a return on their contributions. Overall, these bonds were an essential tool for financing wartime activities. ;
US war bonds primarily supported the war effort by loaning money to the government, allowing citizens to invest in military financing. This practice encouraged public participation and provided returns on investment after the war. The correct option is B.
;