variant matching at lower BOM items

Is it possbile to regenerate little BOM items with variant matching? 

e.g. Material A has a BOM consisting of B C and D configurable materials. All these explode  successful a SO erstwhile A is configured.

when A is configured successful a income order, B is besides copied with the aforesaid char values. For the Char values, B has a worldly variant B1. Is it imaginable to regenerate B with B1 successful a income bid wherever A is configured?