All of the following are factors that influence how much attention supply management should commit to managing supplier quality except $\_\_\_\_\_.$

a$.$

$$a buyer$$s ability to collect and analyze quality$-$related data

b$.$

$$the ability of a supplier to affect a buyer$$s total quality

c$.$

$$the internal resources available to support supplier quality management and improvement

d$.$

$$the physical distance between the supplier and buyer facilities

e$.$

$$the ability of a buying firm to practice world$-$class quality