According to the Web Content Accessibility Guidelines (WCAG), which are the leading international standards for accessible web design, perceivable content is content that can be presented to users in ways they can perceive. This means that the content should be available to the senses (vision, touch, and hearing) either through the browser or through assistive technologies like screen readers, screen enlargers, and others1. Therefore, the content should only be visible is the correct answer, as it implies that the content can be seen by users who rely on vision to access the web. The other options are incorrect, as they suggest that the content is not perceivable to all users.