Which aspect of the march on washington sent a powerful statement to the united staes and the world

The question is incomplete and the full version can be found online.  

the size of the crowd that attended

Explanation:

The aspect of the march on Washington that sent a powerful statement to the United States and the world was the size of the crowd that attended. On August 28, 1963, around 250,000 people assembled in front of the Lincoln Memorial in Washington, D.C. The location at the Lincoln Memorial was already known as an area where public demonstrations were held. And the presence of religious leaders and famous celebrities, such as actors Ossie Davis and Ruby Dee and artists Marian Anderson, Joan Baez, Bob Dylan, and Mahalia Jackson, was important but not the main element that made the event known worldwide.  

c. is the western hemisphere.

d.)   when the us left nato after the end of the cold war and they had to evolve to focus on more humanitarian measures with the smaller budget