Marilyn's travel inc. is a medium-sized travel agency that specializes in vacation packages. it has packages available around the globe-everything from cruises, to beach resort vacations, to historical tours. the customer chooses the amount they would like to pay, the area of the world they would like to visit and what they would like to do. based on this information marilyn's travel uses __________ to delight the customers. lean manufacturing excellent human resources management mass customization the internet