An advertiser attempts to enable target cost-per-acquisition (CPA) bidding but the option isn't available. The most likely reason is that the advertiser:

We help you to get prepared and pass your Marketing online Certification exams. It’s a better way to learn what you need using our Top Quality Time-Saving Guides and practical tips and tricks. More info: https://www.certificationanswers.com/en/

An advertiser attempts to enable target cost-per-acquisition (CPA) bidding but the option isn't available. The most likely reason is that the advertiser:

 A)  is using another automated bid strategy

 B)  is using Google Analytics

 C)  has fewer than 5 conversions in the last 15 days

 D)  has fewer than 15 conversions in the last 30 days

Explanations:

To maximize results and give machine learning algorithms enough data to make informed bidding decisions, you need at least 15 conversions in the past 30 days.