Factors an executive housekeeper should consider when deciding the size of an annual linen purchase include: A. vendor rebates and incentives offering high discount percentages off the regular linen prices for large volume orders. B. salaries and wages of all management and supervisors in the housekeeping department. C. how much linen is "used up" by normal wear and tear, damage, loss, or theft. D. only the initial costs of the linens because estimating the cost of laundering the items over their useful life is effectively impossible