C, as the others dont deal with the selling of securities
if only person was in charge of a government, it would gradually convert into a dictatorship, simply because there are no other branches of the government to keep the executive government in check. This is why governments have three branches, to make sure power is balanced. Two branches and even four branches wouldn't work because of uneven balances in power.
Poor/slaves - Depending on who is their master, they may have almost no rights to large amounts of rights. If they have a 'horrible' master, they are usually worked to the bone and did not have any 'extras', for example being able to go view games, etc. If they have a 'good' master, they get treated well, and have the 'extras'.
consule- A consul is one of two annually elected chief magistrates of the Roman republic
Empire- Usually is the royal family, or the Caesar family, these usually have their titles passed down through family(?), unless there is a coup, and another family takes it over (which happened often towards the end of the empire)
hope this helps
