On Behalf of His Company, OP Finance, Errol Contracted with XYZ

On behalf of his company, OP Finance, Errol contracted with XYZ Construction to erect an office building.The building will cost $150 million.OP Finance has a very high accounts receivable balance.In order to pay XYZ, Errol arranges a loan from CIBc.From the bank's perspective, it would be best to obtain

A) a conditional sale of the building, retaining ownership until OP pays the loan.
B) an assignment of accounts receivable.
C) a general security agreement.
D) a security interest in the building.
E) a floating charge.