What are the campaign and image limits with Google Import for Audience Campaigns?

(A) 10,000 campaigns and 2,000 images per import operation

(B) 20,000​ campaigns and 3,000 images per import operation

(C) 5,000​ campaigns and 1,000 images per import campaign

(D) 30,000 campaigns and 4,000 images per campaign

(E) None of the above