How is AMPscript used to personalize content in an email?

• A. AMPscript processes subscriber data after the email is sent and does not affect content.
• B. AMPscript runs at send time to fetch subscriber attributes and render personalized content.
• C. AMPscript is used to manage suppression lists during send.
• D. AMPscript runs at send time to fetch subscriber attributes (via Lookup, LookupRows), perform logic, and render personalized content or substitution strings within the email.

Answer: (D)