Which one of the following is true concerning the theory of constraints (TOC)?
a. It has a short-term focus and uses cost drivers.
b. It has a long-term focus but does not use cost drivers.
c. it has a short-term focus but does not use cost drivers.
d. It has a long-term focus and uses cost drivers
e. It can have either a long-term or short-term focus and may use cost drivers.