Pioneer Petroleum Company reorders its subscription to Word 365 from Best Buy, an approved vendor. However, Pioneer wants to alter some elements: features, design, packaging, quantity, or delivery times. This change reflects the changes in Pioneer's requirements or Best Buy's lease program. Pioneer has a desire to consider a vendor other than Best Buy. This buying situation is an example of a _________. a. new buy b. straight rebuy c. specialty buy d. modified rebuy