(A) Travel advertisers: Bid boost my ad to users who (+) added a flight to their cart but have (-) not yet purchased it
(B) Banking advertisers: Show my ad to users who have (-) not logged in as a current customer
(C) Retail advertisers: Bid boost my ad to users who have (+) been to the site in last 30 days but (-) not in the last 7 days
(D) None of the above
(E) All of the above