Question: What is a best practice for designing CAPTCHAs? Use visually obscured text that computers cannot read. Use audio options for visually impaired users. Rely on

What is a best practice for designing CAPTCHAs?
Use visually obscured text that computers cannot read.
Use audio options for visually impaired users.
Rely on CAPTCHA behavior to detect human interaction.
Display CAPTCHAs only during critical alert

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