The following is TRUE about Inventory: A. Firms increase inventory because there is an opportunity cost to holding inventory B. Firms increase inventory because more inventory sitting for longer periods of time present more opportunities for damage, errors, rework, theft, and obsolescence C. Firms increase inventory because more inventory means more movement of materials D. Firms increase inventory because there is a risk of significant and unpredictable fluctuations in downstream demand E. Firms increase inventory because the more we spend on inventory, the more we need to spend on other inventory-related expenditures