The correct answer is D.

A High Demand/High Opportunity Cluster should include stores with a clearly high demand index and a positive sales opportunity gap. CMKG explains that store clustering should group stores with similar shoppers, performance, and traits, and that clusters should help retailers target unique local-market demands and manage stores based on opportunity.

Stores 103 and 107 are the only clean match. Store 103 has a Demand Index of 138 and a positive Sales Opportunity Gap of $1,400. Store 107 has a Demand Index of 142 and a positive Sales Opportunity Gap of $3,000. Both are materially above average demand and still have sales upside.

Stores 100 and 108 have high demand, but their opportunity gaps are negative, meaning they are not high-opportunity stores. Store 106 has a positive opportunity gap, but its Demand Index of 107 is only slightly above average and does not fit the ''high demand'' threshold implied by the answer choices. Store 101 has opportunity, but demand is below average at 92.