$xYZ$ printing is building a dominant position as the low$-$cost leader in the $3D$ printer market. Three resources the firm can draw on to build a sustainable advantage are$(1)$ an efficient supply chains and manufacturing system, $(2)$ internal control systems to minimize cost, and $(3)$ competencies in the R&D of electronic products. This set of competencies will make it harder for later movers to imitate. This is an example of using conditions to build protection in the $3D$ printing market.

A$)$ causal ambiguity

B$)$ physical uniqueness

C$)$ path dependent

D$)$ social complex