How does Ward’s description of the Roman government in Doc C compare to Polybius’ description in Doc A and Millar’s description in Doc B? Make it a short answer please.

Polubius' description is very naive and lacks proper research. It is purely academic and based on a study of the laws and procedures of government, elections and law-making. Millar’s description is more balanced as it adds to the description presented by Polubius but does provide the caveat that such description is only true in form and not in substance. Ward’s description on the other hand is thoroughly researched as he focuses not only on how the Roman Republic was formally organized but how it actually functioned on the ground with regards to civil participation in the selection of candidates and voting rights.

They made a checks and balance system to equal power within the branches. the "check" meant that one branch would watch one branch and "balance" them if they were too powerful. if you want more info on this, i would just google checks and balance system.