The resource-based view of competitive advantage states that for a firm to maintain sustainable competitive advantage it must control a set of exploitable resources that have four critical characteristics. What are these characteristics?
a. inventory turns, high margins, long account payable periods, brand building relationships
b. operational effectiveness, strategic positioning, scale, distribution channels
c. rareness, value, imperfect imitability, non-substitutability
d. a website, an app, cloud-based systems, a savvy technology staff
e. low margin, high delivery, infrastructure, customizable