The inference about the 1920s which is supported by this illustration is:
This refers to the use of images to paint a vivid image about societal issues which usually makes use of satire,
With this in mind and from the complete text and image, we can see that there is an illustration of a woman in a sitting position and the inference being made about this was that women challenged traditional attitudes and social norms.
Read more about illustrations here:
https://brainly.com/question/26475534