Which organizations did not align with HUAC?

The correct choice highlights that the Directors Guild of America and the Screen Actors Guild did not align with the House Un-American Activities Committee (HUAC) due to their strong opposition to the committee's investigations into perceived communist influences in Hollywood during the late 1940s and 1950s. These organizations championed the rights of their members and were concerned about the implications of HUAC's actions, which often led to blacklisting and a chilling effect on artistic expression.

By standing against HUAC, these guilds took a stand for civil liberties and the protection of their members' rights, believing that the committee's practices could harm individuals' careers based solely on their political beliefs or associations rather than any concrete actions. This resistance was significant in shaping the discourse around freedom of speech within the film industry during a time of intense scrutiny and fear.

In contrast, the other options provided reflect various organizations that either cooperated with HUAC or did not take a visible stand against it, which is a key distinction in understanding the political climate of the era and the varying responses among filmmakers and industry representatives to the pressures of the Cold War.