問題文
Two sends of a fashion retailer reached very different numbers of inboxes. Marketing wants to compare how persuasive the body content was, independently of how many people opened each one. Which measure fits?
選択肢
- Clicks divided by the links that were placed in the body, because that removes the size of the opening audience from the comparison.
- Clicks divided by the messages that were accepted for delivery, because that removes the size of the opening audience from the comparison.
- Clicks divided by the addresses that were selected as the audience, because that removes the size of the opening audience from the comparison.
- Clicks divided by the people who opened, because that removes the size of the opening audience from the comparison.