$5.$ We learned in the lecture that $$Postponement$$ means to delay product differentiation or customization until closer to the time the product is sold. Postponement can be a powerful tool to improve supply chain management because

a$)$ generic $($non$-$differentiated$)$ products can be made$-$to$-$stock until the customer demand is known and then the manufacturing completed with a short lead time.

b$)$ the shorter the lead time, the more accurate the forecast, so if the differentiation can be pushed to late in the production process, then the forecast can be updated to decide which configurations to make.

c$)$ using common configurations for a base product can be used to take advantage of economies of scale in production and purchasing.

d$)$ all of the statements are reasons that postponement can be a powerful tool to improve supply chain management.

e$)$ none of the statements are reasons that postponement can be a powerful tool to improve supply chain management.