How did the make-up of the roman senate change over time? a the roman senate changed very little over time; senators were elected and consuls were always chosen by the emperor. b by the first century b. c., the roman senate changed so much that it was made up entirely by plebian tribunes, but only patricians were allowed as the consuls. c the roman senate was originally made up of only patricians, though some plebeians were eventually granted power as tribunes and even rose to the position of consul. d the roman senate was at first made up of only plebeians, or lower class people, but as rome became wealthier, the upper class, or patricians, soon took over the senate.