For a one-time email campaign including all female contacts (existing and new):

Option A:Correct. Using a segment (e.g., "Gender = Female") as the recipient source ensures all current and newly added female contacts are included, as segments dynamically update until campaign launch.

Option B:Incorrect. Mobile Engage segment is specific to mobile push, not email.

Option C:Incorrect. Web behavior segment focuses on web actions, not gender or registration.

Option D:Incorrect. "On Registration" is an event trigger for automation, not a one-time batch send.The SAP Emarsys Help Portal under "Email Campaigns" confirms segments for dynamic recipient inclusion.References:SAP Emarsys Help Portal - "Email Campaigns" (https://help.emarsys.com/ ).