Howard Manufacturing executes a construction contract with Gencon, a general contractor, to build a large factory building. The contract includes a subrogation waiver, but Howard understands that questions might arise concerning the waiver's scope. To prepare himself for the most likely questions, Howard should be able to answer all the following questions EXCEPT:

a$.$ How long will the waiver remain in effect?

b$.$ What property does the waiver apply to$?$

c$.$ Where in the insurance policy does this waiver appear?

d$.$ Which parties can assert the waiver?