Buying elaborate screensavers -- programs that put moving images on a computer monitor to prevent damage -- can cost a company far more in employee time than it saves in electricity and monitor protection. Employees cannot resist spending time playing with screensavers that flash interesting graphics across their screens. Which one of the following most closely conforms to the principle illustrated above? ['An electronic keyboard may be cheaper to buy than a piano but more expensive to repair.', 'An energy-efficient insulation system may cost more up front but will ultimately save money over the life of the house.', 'The time that it takes to have a pizza delivered may be longer than it takes to cook a complete dinner.', 'A complicated hotel security system may cost more in customer goodwill than it saves in losses by theft.']