You are the project manager for an interior design project. The project calls for a particular grade of wood for the trim. As it turns out, however, the wood needed for the trim is mahogany, and this wood costs three times as much as was originally estimated. A carpenter on the project team suggests using oak instead of mahogany and then staining it to look like mahogany. The customer and you concur with the carpenter's suggestion. This is an example of which one of the following?

A$.$ Cost control

B$.$ Alternative identification

C$.$ Poor cost estimating

D$.$ Expert judgment