Not supported, because we don’t know whether Wagner and Wright’s work was not immediately appreciated by the public.

This captures the purpose of mentioning Wright and Wagner. The author notes that, for some architects whose work was not thought to advance modernism, the proponents tended to dismiss their work. But on the other hand, for artists like Wager and Wright, the proponents emphasized the modern aspects of their work.

Not supported, because the author never indicates whether Wagner and Wright actually helped to popularize the Modern Movement. Proponents of the movement pointed to the modern aspects of their work and tried to claim those architects as modernists, but we don’t know whether this portrayal of Wagner and Wright actually led to the popularization of the proponents’ architectural philosophy.

The author never indicates how Wagner and Wright interacted with their clients and whether they dictated what their clients should get.

Actually, the author brings up Wagner and Wright as architects the proponents of the Modern Movement claimed as part of the movement. Although the proponents ignored aspects of their work that was not modernist, there’s no indication that proponents believed the “early work” of Wagner and Wright went against the principles of modernism.