HELPPP ASAP! WILL GIVE 50 POINTS AND BRAILEST IF CORRECT!!!

Ancient Rome and modern day u.s. are/were both republics. What does that mean
A. They both operate under a government where the citizens make all government decisions

B. They both operate under a government where a small group of indivisuals make all of the decisions

C. They both operate under a government where the citizens elect representitives to serve as government officials