What led to a decline in the Knights of Labor’s membership in 1893?
a) The leaders’ emphasis on the use of strikes rather than arbitration in the labor movement
b) Differences in opinion between the leaders and the general membership of the union
c) The leaders’ short-run perspective of satisfying day-to-day grievances but ignoring long-term issues
d) The conflict with the Roman Catholic Church over the rule that Catholics were prohibited from joining the Knights