What must be monitored in order to manage the risk of consumer product inventory obsolescence?

Inventory obsolescence risk is driven mainly by whether inventory on hand can be sold before it becomes outdated, unsellable, or requires markdown. Monitoring inventory balances is essential because excessive quantities, slow-moving items, or aging stock indicate potential obsolescence. Monitoring sales trends is equally important because declining sales may show reduced demand, product substitution, seasonal changes, or market rejection. Together, these measures help management identify items requiring discounting, production changes, procurement reduction, or write-down evaluation. Market share forecasts may provide broader strategic insight, but they are less direct for managing existing inventory obsolescence. Sales returns may indicate quality or customer satisfaction problems, but returns alone do not adequately measure whether inventory is becoming obsolete. Therefore, the necessary monitoring items are inventory balances and sales trends, making Option C correct.