In order to reduce the number of items damaged while in transit to customers, packaging consultants recommended that the TrueSave mail-order company increase the amount of packing material so as to fill any empty spaces in its cartons. Accordingly, TrueSave officials instructed the company's packers to use more packing material than before, and the packers zealously acted on these instructions and used as much as they could. Nevertheless, customer reports of damaged items rose somewhat. Which of the following, if true, most helps to explain why acting on the consultants' recommendation failed to achieve its goal? ['TrueSave has lost some of its regular customers as a result of the high number of damaged items they received.', 'The amount of packing material used in a carton does not significantly influence the ease with which a customer can unpack the package.', 'The change in packing policy led to an increase in expenditure on packing material and labor.', 'When packing material is compressed too densely, it loses some of its capacity to absorb shock.']