Which two filtering options could be used when configuring the Contact synced object?

Northern Trail Outfitters wants to use Synchronized Data Sources to sync Contact data from Salesforce CRM. However, they only want to sync records they would be able to send to reducing the amount of data being brought over.

Which two filtering options could be used when configuring the Contact synced object? Choose 2 answers
A . Select all records which have opened an email in the past six months
B . Select all records with an email address
C . Select all records which are active in All Subscribers
D . Select all records where HasOptedOutofEmail is FALSE

Answer: B,C