What allows customers to obtain personalized information by querying corporate databases?

The correct answer focuses on the concept of E-integration, which involves connecting various information systems and databases within a corporation. This integration enables customers to retrieve customized information by effectively querying these interconnected databases. When data from multiple sources is integrated, it allows for a more comprehensive view of the information available, which can be tailored to meet individual customer needs and preferences.

E-integration facilitates the delivery of relevant data to customers in real-time, ensuring that the information they access aligns with their specific inquiries and interests. It enhances customer experience by providing them with a more personalized service through data-driven insights, thereby improving customer satisfaction and engagement.

The other options do not directly relate to the capability of allowing customers personalized access through queries to corporate databases. E-filing typically refers to the electronic submission of documents, E-information is a broader term that may not imply the interactivity of querying, and E-tailing specifically focuses on online retailing, which does not inherently involve customer queries to corporate databases for personalized information.