In the case study, it is mentioned that "Tiger Brands needs to play a linkage role between smallholder farmers and the commercial sector". Also, Tiger Brands must get agricultural mega$-$collector suppliers $($e$.$g$.$ cooperatives$)$ involved and these collector suppliers are the new, expert, black$-$owned farming organisations that work directly with farmers to provide technical and management skills, who need to incorporate smallholder farmers in their procurement volumes and growing plans. The process of forming linkages, involving collector suppliers, managing skills, and sharing information may be termed

a$.$ green sustainable environment

b$.$ process integration

c$.$ supplier development

d$.$ supply chain