Explanation
To ensure only specific Contacts are synced from Sales Cloud, the admin should filter records on a Boolean field1. This allows the admin to select only the Contacts that have a true value for a checkbox field, such as
"Sync to Marketing Cloud" or "Email Opt-in"1. Filtering records on a formula field, a date field, or existing records in All Subscribers are not supported options for synchronizing Contacts

Explanation
The Marketing Cloud admin should consider that building desirable sending history and data will be variable based on list size and engagement when sending from the new IP address. A new IP address has no reputation with ISPs and needs to be warmed up gradually by sending emails to engaged and active subscribers. The send volume and frequency should be adjusted according to the list size and engagement level of NTO's subscribers to avoid being marked as spam or blocked by ISPs. The other options are incorrect because:
* The IP address is on reserve, is already in use, and has an email sending history. This describes an existing IP address, not a new one. An existing IP address already has a reputation with ISPs and does not need to be warmed up.
* Sending in large volumes will alert ISPs the new IP Address is now in use. This is not a consideration, but rather a mistake. Sending in large volumes from a new IP address will raise red flags with ISPs and may result in poor deliverability or blacklisting.
* Migration of larger marketing campaigns is necessary prior to bringing on smaller, triggered campaigns.
This is not a consideration, but rather the opposite of what should be done. Migration of smaller, triggered campaigns should be done first before bringing on larger marketing campaigns, as this will help build trust and reputation with ISPs.

Explanation
Advertising Studio supports lookalike audiences directly from Facebook only. For other networks, such as Google and Twitter, Advertising Studio can create audience segments based on Marketing Cloud data and export them to the network's platform, where the lookalike audience can be created manually.