Chain stores are retail establishments operating under a unified brand across multiple sites. Their defining characteristic is the employment of specialized professionals for key executive functions, ensuring uniformity and operational effectiveness across all branches. These functions encompass inventory, human resources, and customer service, all demanding specific expertise.
Option (A) is refuted as chain store efficacy can vary between rural and urban settings due to disparities in infrastructure, consumer tastes, and economic capacity.
Option (B) is dismissed because chain stores primarily engage in retail, not wholesale, activities.
Option (D) is incorrect as chain stores target a broad consumer demographic, not exclusively affluent individuals, aiming for extensive market penetration. Therefore, option (C) is the correct choice.