Writing valid HTML adheres to which WCAG principle?
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Correct answer: Robustness.
Why this is the answer
Valid HTML supports reliable interpretation across browsers and assistive technologies . HubSpot recommends using semantic markup and correct semantic elements so the content inside each element is clearly communicated to screen readers and web browsers. That makes the page structure more dependable across different technologies and aligns with the WCAG principle focused on compatibility. The emphasis is on markup being interpreted correctly, not on appearance, interaction method, or wording clarity. HubSpot Developers
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