(A) The measurement and understanding of how successful a sender is at getting their marketing email into people’s inboxes.
(B) A program to get into people’s inboxes.
(C) The measurement of how successful a sender is at not getting lost in the spam folder.
(D) The measurement and understanding of spam filters.
This question is a part of the HubSpot Email Marketing Quiz question from Lesson 3 and the HubSpot Email Marketing Certification Exam. You can check out all the answers to these quiz questions in our HubSpot Email Marketing Quiz Answers page and the main certification exam in our HubSpot Email Marketing Certification Exam Answers page.