Though difficult to accurately measure, the market value of U$.$S$.$ real estate held by non$-$real estate corporations is estimated to exceed $$16\mathrm{.}7$ trillion. All of the following are examples of non$-$investible commercial real estate EXCEPT:

Multiple Choice

medical office buildings owned by the hospital.

branch offices owned by the bank.

plant and equipment owned by steel corporations.

assembly plant building owned by a group of investors as part of an LLC$.$