instead of eating french fries with ketchup, fast food customers should dip their fries in milkshakes…

Brief Explanations:

The thesis suggests an alternative dipping - option for fast - food fries. An opposing argument could be based on the traditional taste preferences and the common pairing of fries with ketchup. It could also point out that the texture and flavor combination of fries and milkshakes may not be appealing to most customers.

Answer:

Many fast - food customers prefer the classic combination of fries and ketchup due to traditional taste preferences, and the texture and flavor of fries dipped in milkshakes may not be appealing to the majority.