A customer has purchased fittings from Allied Fitting Supply for the past three years and is happy with Allied's sales and service representatives. Which of the following is a reason the customer might begin a modified re-buy process instead of performing a straight re-buy? a. The customer's management structure has changed. b. Allied Fitting Supply's catalog has gone from paper to digital. c. The customer's sales process has changed. d. The customer's product design has changed. e. Allied Fitting Supply's sales process has changed