Which of the following is NOT a best practice to optimize forms on mobile?
Offering users a numerical keyboard for telephone number field
Showing labels inside form fields for convenience
Exposing options instead of using a drop-down menu
Using a real-time validation for errors in forms
Explanation:
Putting labels inside fields caused problems if they disappeared when information was entered, leaving participants without guidance. Once information is entered, validate it for errors in real-time prior to submission to prevent users from having to resubmit.
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