The wars of revolutionary France against Austria, Spain, Prussia, England, and Russia were interesting because _____.

AThe hated royal practice of capital punishment was banned.
BThey created a new calendar with new months and 10 day weeks and declared that the year of the revolution would be numbered as the year 1.
CThey instituted a "Cult of the Supreme Being" as a state religion instead of the Catholic Church.
DPriests were required to swear loyalty to the French state, not to the pope.