The breadth economy is an economy that diversifies the production or operation of goods or services. When the cost of producing X and Y at the same time is lower than the production of two separate goods or services, there is a breadth economy. According to the above definition, which of the following is breadth economies? ['Chocolate factory chocolate production line is also used to produce chocolate peanut beans.', 'In addition to the dry cleaning business, the dry cleaning shop also provides services such as leather clothing maintenance.', 'The industrial park of "Famous" beverage company also has a workshop for producing "Famous" children\'s clothing.', 'Travel agencies sell a variety of tourism products while providing tour guides and escort services for a fee.']