Which of the following pairs of products BEST illustrates the concept of joint demand?

Question

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Joint demand refers to the demand for two or more products that are used together to create a final product or service. In the case of a grandfather clock, both the pendulum and the case are essential components that work together to create a functioning timepiece. The other options, such as chocolate and vanilla ice cream or a pumpkin and carving tools, are not necessarily used together to create a final product, making them less suitable examples of joint demand. The thermometer and barometer are also not typically used together, as they serve different purposes.

Which of the Following Pairs of Products BEST Illustrates the Concept