I believe it was B since he reversed several previous positions. While he did meet with MLK, I don’t think he had anything to do with founding the SCLC.
"It was strategically located to deal with the Persians in the east and barbarians to the north" was not a reason why the Emperor Constantine selected the ancient town of Byzantium as the site for his new capital of Constantinople, since this location did not mitigate many of the effects of foreign invasions.
