The true statements are these:
A.) The first time marchers tried to cross the bridge, they were attacked and beaten by state troopers.
B.) Many Americans were sickened by what they saw on television.
There were roughly 2,000 (not 20,000) who made the successful march from Selma to Montgomery, March 21-25, 1965. When they arrived in Montgomery, they were met by a crowd of nearly 50,000 supporters, both blacks and whites in that supportive group.