Replying to History majors help .. input on christian liberty by martin luther essay help

not intention on discussing religion here just trying to get help for my in class essay test tomorrow ( fucking sucks ) but we have to compare the social contract and christian liberty ...

one of the possible questions we may have to answer tomorrow is : Both authors spend a great deal of time analyzing the concept of sovereign. who is sovereign in "christian liberty" and who is in "the social contract" .. how do the two differ ? who is each sovereign ultimately answerable to ?

i have a pretty good idea on the social contract but am pretty lost on christian liberty ....

any help is appreciated, i don't have it till 330 tomorrow.