Answer: Maturity stage
Explanation: In simple words, it refers to the longest stage of product life cycle in which the sales growth of the product starts to decline. In this stage , the company experiences highest demand for the products and often find problems in maintaining the market share.
In the given case, Binney and smith have their operations in 80 countries and are having problem in maintaining the current market share.
Hence from the above we can conclude that the company is in maturity stage.