One of the most significant results of the artistic experimentation of the 1920s and 1930s was that

Aartists learned to adhere to accepted public definitions of reality.

Bphotography was no longer considered a legitimate art form.

Cgenerally accepted standards that distinguished between "good" and "bad" art disappeared.

Dimpressionism was recognized as the single best art form.

Ea set of criteria was established that allowed art students to distinguish between "good" and "bad" art.