单项选择题
A．how to settle a consumer's complaint about a faulty item B．how to make an effective complaint about a faulty item C．how to avoid buying a faulty item D．how to deal with complaints from customers
A．natural foods B．eating habits C．healthy eating D．food problems
A．the quantity of foods B．the quality of foods C．either the quantity or the quality of foods D．the quality as well as the quantity