Which of the following is a testable element for click-through rate?

via IFTTT Which of the following is a testable element for click-through rate? A) Frequency B) Timing C) Preview text D) Call-to-action click here for the answer https://goo.gl/rJx24u hubspot email marketing certification cheat sheet, email marketing is most relevant to these stages of the inbound methodology, when sending emails, segmenting your contact database allows you to do all of the following except, true or false: email should not be sent based on user behavior on your website, email marketing hubspot exam, hubspot inbound certification exam answers 2017, hubspot marketing software exam answers 2017, hubspot marketing software certification answers 2017 https://youtu.be/jjE3gaaWXQU Technology Adda