Which set of tests must pass on a webpage so that non-conforming content doesn't interfere or block access to accessible content?

• A. (2A) Pause, Stop, or Control Volume of Audio Content That Plays Automatically; (2B) Pause, Stop, or Hide Moving, Blinking, or Scrolling Content; (2C) Pause, Stop, Hide, or Control Frequency of Auto-Updating Content; (3A) No Flashing Content Is Present; (4C) There Are No Keyboard Traps
• B. (2A) Pause, Stop, or Control Volume of Audio Content That Plays Automatically; (2B) Pause, Stop, or Hide Moving Content; (2C) Pause, Stop, Hide, or Control Frequency of Auto-Updating Content; (3A) No Flashing Content Is Present
• C. (2A) Pause, Stop, or Control Volume of Audio Content That Plays Automatically; (2B) Pause, Stop, or Hide Moving, Blinking, or Scrolling Content; (3A) No Flashing Content Is Present; (4C) There Are No Keyboard Traps
• D. (2A) Pause, Stop, or Control Volume of Audio Content That Plays Automatically; (2B) Pause, Stop, or Hide Moving, Blinking, or Scrolling Content; (2C) Pause, Stop, Hide, or Control Frequency of Auto-Updating Content; (3A) No Flashing Content Is Present

Answer: (A)

The essential idea is to ensure content that could interfere with accessibility is either made controllable or removed, so users who rely on assistive technologies or have sensitivity to motion aren’t blocked from accessing the page. The strongest set of tests covers five areas: first, any audio that plays automatically must be controllable—pause, stop, or adjust the volume—so it doesn’t overwhelm or interrupt a user who is using screen readers or focusing on other tasks. Second, moving, blinking, or scrolling content should be pauseable, stoppable, or hideable so it doesn’t distract or disorient users who are visually scanning the page. Third, automatically updating content should be pauseable or its update frequency be controllable to prevent sudden changes from disrupting focus or causing confusion. Fourth, there must be no flashing content that could trigger seizures or cause distraction. Fifth, keyboard navigation must not trap focus, ensuring users can move through the page using a keyboard without getting stuck. Together, these tests prevent non-conforming content from interfering with accessible content, making the page usable for a wider range of users.