I'm not learning about MLK currently, and I'm a bit confused when it comes to blank 2 but I'm sure 1. is correct, as MLK ended up inspiring the Civil Rights movement and kept leading it on WAY stronger than ever after his infamous words. Based on the quick research I've done 2. should be correct, but I'd double check!
I'm pretty sure it's B because I'm learning in A P E X and it said that the people army sent was a complete failure but when they sent nobles and knights they won for a bit