What was alfred stieglitz’s role in modernism in america?

Here are some of the options that represent how important Alfred Stieglitz was for Modernism in America:

1. He aided in the development of Modernism - if it weren't for him, who knows whether Modernism would have ever reached America.

2. He was an advocate for photography as art - before him, photography wasn't really given much prominence in artistic circles, however, he was the one to change that.