Anderson $($A$)$ agrees to sell Wal$-$Smart $($WS$)5,000$ bicycles. Prior to the A$-$WS contract, A contracted with BicycleManufacturer $($BM$),$ to supply him with $5,000$ bicycles. BM halts production and cannot produce all the Bicycles for A$.$ In this case, A may be discharged by Blank$\_\_\_\_\_\_$ since the means of performance contemplated in the contract cannot be performed.

Multiple choice question.

frustration of purpose

commercial impracticability

impossibility

force majeure