How do constitutional governments differ from totalitarian governments?

a$)$ Totalitarian governments have popular sovereignty, whereas constitutional governments do not.

b$)$ While both totalitarian and constitutional governments hold elections, elections in totalitarian governments occur more frequently.

c$)$ Constitutional governments have multiparty systems, while totalitarian governments are restricted from having political parties.

d$)$ Constitutional governments possess effective, formal limitations on their powers, while totalitarian governments recognize no formal limits and eliminate institutions that challenge them.