(C) Last interaction
(D) Simple decay
If you want to know which marketing effort is attracting people to your brand, you should use the First-touch attribution model.
First-touch attribution model refers to the first touchpoint or channel that a user interacted with before converting on your site. So if someone first discovered your business via a paid search (PPC) ad, that channel would get the credit for a conversion.
This question is a part of the HubSpot Digital Advertising Certification Exam. You can find answers to all the questions asked in this exam on our HubSpot Digital Advertising Certification Exam Answers page.