If a Middle Eastern Culture and the American Culture Differ

If a Middle Eastern culture and the American culture differ as to the morality of a particular action, under ethical relativism:

A) both cultures are correct.
B) the action should be assessed to determine whether the action produces more net pleasure compared with net pain.
C) a cost-benefit analysis should be conducted to determine the relative economic efficiency of the action.
D) the action should be viewed through a "veil of ignorance" to determine whether it is ethical.