A.I. Explanation:

Option 1: "To increase the town's revenue through subscriptions"

Explanation: The text does not mention any revenue generation or subscription fees associated with the digital library service. Instead, it states that the service is free for all residents, indicating that the primary goal is not financial gain but rather community access to resources.

Option 2: "To provide entertainment options for teenagers"

Explanation: While the digital library does offer access to a range of electronic books and audiobooks, the text emphasizes enhancing educational opportunities and promoting literacy for all age groups, not specifically targeting entertainment for teenagers.

Option 3: "To enhance educational opportunities and promote literacy"

Explanation: Although this option reflects part of the initiative's goals, it does not capture the primary focus of replacing traditional libraries with digital ones, which is the main point of the text.

Option 4: "To replace traditional libraries with digital ones"

Explanation: This option accurately reflects the initiative's aim to provide a digital library service, which is implied to be a modern alternative to traditional libraries. The text discusses the launch of a digital library service, indicating a shift in how library services are delivered.