Which of the following is the soundest principle for inventory management?

Stock a large number of the bestselling items to avoid shortages.

Conduct a thorough analysis of your inventory practices and implement a point$-$of$-$sale system that integrates inventory management.

Stock everything customers may want so that you do not lose business to competitors.

Personally know your inventory backward and forward so that as the owner, you can always answer any questions about the products.