Kathy has a broken washing machine and she searches online for several hours comparing brands and features. Then she goes to three appliance dealers to review those models and consults with the sales staff about delivery, installation, and price. In the store from which she finally makes her purchase, they give her a demonstration of the machine. Kathy's purchase is an example of the problem-solving variation

Extended

Explanation:

 The extended problem solving variation is one of the process in which the customers are trying to get all the information which is related to the products and the specific brand for the buying purpose.

According to the given question, Kathy is searching online for buying the appliance that is washing machine and she comparing various types of features and the brands based on the model.

Based on the given scenario, the Kathy's purchasing is one of the example of extended problem solving variation where the customer does not aware about the brands and the actual features of the products.  

Therefore, Extended problem-solving variation is the correct answer.

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