In $1983,$ Harley$-$Davidson faced extinction. Twenty$-$five years later, the company boasted a top$-5$o global brand valued at $$7\mathrm{.}8$ billion. Central to the company's turnaround, was Harley's commitment to building a brand community: a group of ardent consumers organized around the lifestyle, activities, and ethos of the brand. In today's turbulent world, people are hungry for a sense of connection; and in lean economic times, every company needs new ways to do more with what it already has. HarleyDavidson's brand community is an example of a $$

a$.$ sociomatrix

b$.$ relational ties

c$.$ network

d$.$ sociogra