how did the strategies of the north and south change with the Union attack on port royal?
a) the north refocused its efforts to blockade the port of charleston in case of another attack.
b) the north lifted its naval blockade of charleston after its attack failed, while the south reopened its trade routes with france.
c) The north turned to diplomacy to convince the south to surrender, while the south sought recognition from Britain or France.
d) The north began enlisting more black soldiers after they proved so brave during the attack, and the south vowed to treat black soldiers as runaway slaves.