Acompany resource weakness or competitive deficiency:
a. prevents a company from having any distinctive competence
b. usually stems from having a missing link or links in the industry value chain
c. causes a company to fall into a lower strategic group than it otherwise could compete
d. all of the above

D. All of the above.

Explanation:

A company resource weakness or competitive deficiency is basically anything a company lacks or doesn't do rightly which puts it at a disadvantage in the marketplace.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.