Which avant-garde artist designed the 1919 propaganda poster 'Beat the Whites with the Red Wedge', an iconic work of graphic design using geometric abstraction?

• A Alexander Rodchenko
• B El Lissitzky ✓
• C Varvara Stepanova
• D Gustav Klutsis

El Lissitzky's poster reduces the Civil War to a red triangle piercing a white circle, a Suprematist abstraction that was revolutionary in political communication.