Select all correct statements.

High inventory levels lead to customization.

Even for make$-$to$-$order $($pull$)$ type manufacturers, it is difficult to operate at zero level inventories.

ERP systems can eliminate dead stock.

Better sales forecasts may decrease inventory levels.

Product differentiation and customization practices have no impact on inventory management decisions.

When customized products are returned, they can be sold again easily.

Online retailers may treat returned items as dead stock and send them to landfill.

Practicing product differentiation may increase the risk of dead stock.