What does synchronized text-audio playback in EPUB enable for users?

Synchronized text-audio playback in EPUB enhances the reading experience by allowing the text and audio to be presented simultaneously. This integration provides a seamless auditory and visual experience for users, making it especially beneficial for those who may be visually impaired or have reading difficulties. By following along with the text while listening to the corresponding audio, users can improve their comprehension and retention of the material.

This feature is particularly valuable in educational contexts, where it aids language learners or individuals with learning disabilities by reinforcing their understanding through multiple sensory channels. The simultaneous playback ensures that users can comfortably and effectively engage with the content, fostering a more inclusive reading environment.

Other choices, while they may touch on aspects of design or engagement, do not capture the core benefit of synchronized text and audio, which is about improving the overall reading experience for users, making option B the most relevant and accurate answer.