Hellp plz which choice best describes vice president johnson's argument in his "memorial day address”?

a. african-americans need to be patient because it takes time to change social views.

b. more laws need to be passed and enforced to ensure equality for all american citizens.

c. we have failed as a nation by not giving all citizens equal rights and opportunities.

d. we as a nation must understand the horrors of slavery and its ongoing effects.