Answer:
to sign the Emancipation Proclamation
Explanation:
When MLK, Jr. and 200,000 people marched, they were marching for all the following reasons except "to sign the Emancipation Proclamation."
The March on Washington involving Martin Luther King Jr., and 200,000 Americans which took place on 28th of August 1963, was based on the issue of job and freedom, including integration of schools by the end of the year, ending of job discrimination, and a civil rights bill. It was at this event MLK delivered his famous speech "I have a dream."
However, Emancipation Proclamation was issued by Abraham Lincoln on January 1, 1863, during the American civil war which declared all slaves free.