Which statements about the events in Selma ate true. choose all answer that are correct a. more then twenty thousand people joined the final successful selma to Montgomery march to show they supported the civil rights movement
b. the first time marchers tried to cross the bridge they were attacked and beaten by state troopers
c. many Americans were stickened by what they saw on television
d. president Johnson refused to support the march for fear of losing political support in the south​