Why might Hans Brosamer's woodcut (Source D) be an effective propaganda weapon against Martin Luther?

It showed Martin Luther as an Antichrist with seven heads with different opinions.

Explanation:

Martin Luther's reformation was not welcome among the Catholic worshipers in Europe. By looking at the increasing people following Luther's religion, the Catholics started to spread propaganda against him. Woodcuts (engraved pamphlets) became a foremost way of declaring messages in the propaganda wars during the Protestant Reformation. Protestants and Catholics charged one another practices, doctrines, and leaders through prints.

Hans Brosamer's woodcut 'Caricature of Luther with Seven Heads', applied as a propaganda weapon for the Catholics against Martin Luther because it gave him a character of an Antichrist whose opinions would probably be as different as his seven heads.