Sid Contracts to Put New Kitchen Cabinets in Ned's House

Multiple Choice

Sid contracts to put new kitchen cabinets in Ned's house. Sid repeatedly tries to install the cabinets, but Ned does not grant him access to the house. In this case:

A) Ned is discharged from his duties under the contract because of material breach.
B) the frustration of purpose doctrine applies to discharge the contract.
C) Sid is discharged from his duties under the contract because Ned's prevention of Sid's performance constitutes a material breach.
D) Both Sid and Ned are discharged from their duties because of impossibility of performance.