McDonald's started with a simple concept in 1940 - fast service offering only hamburgers, cheeseburgers, potato chips, and drinks at the start. However, they menu soon expanded to include French fries and milkshakes. This process of menu expansion continues to today, with a broad range of sandwiches, drinks, salads, and breakfast items to serve their customers. There does not appear to be any end in sight to the menu items! This expansion is an example of: McDonald's started with a simple concept in 1940 - fast service offering only hamburgers, cheeseburgers, potato chips, and drinks at the start. However, they menu soon expanded to include French fries and milkshakes. This process of menu expansion continues to today, with a broad range of sandwiches, drinks, salads, and breakfast items to serve their customers. There does not appear to be any end in sight to the menu items! This expansion is an example of: product development. market penetration. diversification. market development