Which statement is true of the demand management process?

a$.$ It ensures that firms in the supply chain have the needed resources to manufacture with flexibility and to move products through a multistage production process

b$.$ It seeks to minimize the costs of serving multiple types of customers who have variable wants and needs

c$.$ It aligns supply and demand throughout the supply chain by creating customer$-$focused plans of action immediately after an actual purchase is made

d$.$ It presents a multi$-$company, unified response system to the customer whenever concerns are voiced