13) With CPA bidding for display ads, advertisers pay Select one:

a. only when an ad is clicked

b. per website where the ad is displayed

c. per 1,000 impressions

d. per conversion

14) Display advertisers can choose from all of the following bidding methods, except Select one:

a. cost-per-ad

b. cost-per-click

c. cost-per-mille

d. cost-per-acquisition

15) If an advertiser wants to place a display ad on a specific website, then _____ can be used. Select one:

a. keyword targeting

b. placement targeting

c. interest targeting

d. topic targeting

16) In terms of the time of day for sending emails, the best time is Select one:

a. in the morning

b. during the mid-day

c. in the evening

d. when response rate is highest