Absent an express prohibition, subleasing and assigning the lease are both available options for you.
Regarding the lease, we are all free to break contracts whenever we wish; we just have to pay the other party their damages for the breach. Here, while it would still be advantageous to work out an agreement with the landlord, you can nonetheless break the lease which will trigger an obligation on landlord's part to mitigate its damages.
A strategy may be to threaten to sublease to someone that they won't know; they may prefer to have control over who is living there. But remember, if you do sublease, you are responsible for your tenant.
Anyway, a bunch of short answers to your question. Hope it helps.
Accessing this website or receiving an electronic transmission from Nagle Law Group, P.C., or any specific attorney at Nagle Law Group, P.C., does not create an attorney-client relationship or any other duty on the part of Nagle Law Group, P.C. An attorney-client relationship is only created upon an express agreement with an attorney at Nagle Law Group, P.C.