b$.$ A CEO of a company suddenly commands that the company will become lean manufacturing company due to increased inventory. Identify the statement that suits the situation.

a$.$ The plan of introducing a lean manufacturing system may be effective to avoid inventory.

b$.$ The plan of introducing a lean manufacturing system may increase the productivity of the company.

c$.$ The CEO of the company has not given any action plans and the inventories created are not because of the production excess alone. It may even due to poor quality of the product.

d$.$ Implementing a lean manufacturing system leads to increased cost of manufacturing.