An approach known as the $\_\_\_\_\_\_\_\_\_\_$ view of competitive advantage shows that if a firm is to maintain sustainable competitive advantage, it must control a set of exploitable resources with four critical characteristics. These resources must be $(1)$ valuable, $(2)$ rare, $(3)$ imperfectly imitable, and $(4)$ nonsubstitutable.

a$.$

Strategic$-$based

b$.$

Resource$-$based

c$.$

Technology$-$based

d$.$

Ownership$-$based