How Is the Effect of Decentralization Within a Sales Structure

How is the effect of decentralization within a sales structure best summarized?

A) Decentralization improves efficiency but has less impact on effectiveness.
B) Decentralization in the sales structure decreases the responsibility for decision making of those working in the field.
C) Decentralization allows individuals to become experts on particular tasks and leads to better performance.
D) Decentralization in the sales structure increases responsibility for decision making to those working in the field.