What was the purpose of the Office of War Information? to intercept letters coming into the United States to inform manufacturers what military equipment to build to instill patriotism and support for the war effort to spy on citizens of Japanese, German, and Italian backgrounds

The Office of War Information had as its purpose spreading Information both internally and externally (in form of propaganda among the Germans) about the War effort - and to present the US side of the war in favourable light.

The correct answer is to instill patriotism and support for the war