Which choice most logically completes the text?

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To understand consumer loyalty to specific online retailers, Vijoleta Vrhovac and colleagues conducted a survey using 58 statements as proxy indicators of customer experience with receiving online purchases. The statements were categorized by topic-e.g., statement 13, "I am eagerly awaiting the delivery of the ordered items," was categorized as joyful anticipation and respondents, all of whom were from Serbia (which is characterized as having a developing economy), rated the importance of each statement to their experience. Researchers found that participants placed low importance on package aesthetics and high importance on speedy delivery and package tracking, but the researchers cautioned against applying the findings to customers generally, suggesting that

additional research is needed with participants from countries of varying levels of economic development to determine whether delivery time and tracking are more important than package design to customers broadly.

customers in countries with higher levels of economic development than that of Serbia are likely to regard package design as relatively more important than delivery time and transparency.

the greater importance assigned to delivery time and tracking than to package design may not be observed if the survey were to be given to a larger group of Serbian participants.

online retailers that operate in a variety of countries are more likely to increase customer loyalty if they make their deliveries in less time and allow customers to track those deliveries than if they improve their packaging.