Agency employees interact with Taco Bell employees across job types because they need knowledge about the products and plans, increasing their: a. boundary spanning.
b. hierarchical sensitivity.
c. decision informity.
d. staff validity.
e. task validity.

c. decision informity.

Explanation:

Since in the question it is mentioned that there is a interaction of Agency employees with the employees of Taco bell for different types of job as they need the knowledge regarding the product and plans that increased the decision informity

As if you have great knowledge and information so you are able to take the right decision i.e. ultimately good for a company

Therefore the option c is correct

answer; ///(d); determining who competes most closely   with whom evaluating whether industry driving forces and competitive pressure favor some strategic groups and hurt others, and ascertaining whether the profit potential of different strategic groups varies due to the strengths and weaknesses in each groups respective market positions;

answer loneliness;