(A) Second to last campaign, search or ad
(B) Equal credit along the conversion touchpoints
(C) Last campaign, search, or ad
(D) First campaign, search or ad
By default, the Multi-Channel Funnel Reports follow the Last-Click Attribution model which means the conversion credit is given to the last campaign, search, or ad that referred the user which led to the conversion or e-commerce transaction.
This question is a part of the Google Analytics Individual Qualification. You can get all the answers with detailed explanation for this exam in our Google Analytics Individual Qualification Exam Answers page.