(A) Decide that three hours is long enough because people never check our emails after that.
(B) Try to test for 24 hours to give us enough time to produce statistically significant results.
(C) Three hours is too long. We should only run it for an hour so we can make our decision faster.
(D) We should review past emails we’ve sent to see where opens and clicks start to drop off, then identify the time frame we want to test in.
This question is a part of the HubSpot Email Marketing Certification Exam. You can find answers to all the questions asked in this exam in our HubSpot Email Marketing Certification Exam Answers page.