Read the paragraphs below and choose an appropriate main idea.

By listening to customer feedback, we can get their opinions on how we are doing and find out about what it is that they want. We also need to be aware of changes in customer demands and keep up with the times. When fast-food restaurant McDonald's realised that the market wanted healthier choices, they introduced fruit and salads, while removing the 'super-size' option from their menus.
Your business might be doing well, but there is no growth or development and there is a risk that your competitors might take away some of your customers. Innovation sometimes means developing a new product that targets a different market. Although video games were often played by boys, in 2006, video games giant Nintendo introduced the game console Nintendo Wii, successfully targeting girls and older customers with games like Cooking Mama and Brain Training.

• Companies ought to receive and accept customers' reviews while expanding their businesses.
• The development of the company can be avoided by introducing new goods and services.
• McDonald's is a successful company now because it managed to provide relevant services.
• If a company wants to be successful, it needs to copy the business strategies of McDonald's or Nintendo.