Which steps always need to be completed in order to accomplish this?

A field needs to be created on the Person object that is visible in both CRM and Adobe Marketo Engage.

Which steps always need to be completed in order to accomplish this?
A . Create a field on the lead or contact objects in CRM. provide read/write access to the Adobe Marketo Engage Sync User
B. Create a field on the person object in Adobe Marketo Engage, refresh the schema in Adobe Marketo Engage
C. Create a field on the lead and contact objects in CRM, add this field to Marketing User page layout

Answer: A