The concept of core competencies was originally devised by:
Select one:
a. Michael E. Porter
b. C. K. Prahalad and Gary Hamel
c. John Dunning and John Child
d. Jay B. Barney
Select one:
a. Michael E. Porter
b. C. K. Prahalad and Gary Hamel
c. John Dunning and John Child
d. Jay B. Barney