Dr Patty Iris, a Well-Known Psychologist, Has Developed a New

Dr. Patty Iris, a well-known psychologist, has developed a new online program that helps people stop smoking. To promote it, she has placed ads on social media that drive people to a landing page, where they are invited to sign up (submit their names and email addresses) in order to watch a free video sample of the program. Although she's used the same ad each time, she has designed and used several different variations of the landing page, and now she'd like to know which combination worked best so she can continue to use it. How would you recommend she calculate the conversion rate for her landing page? ​

A) Divide number of sign-ups by number of visitors to the landing page
B) Divide number of ad clicks by number of ad impressions
C) Divide number of ad clicks by number of visitors to the landing page
D) Divide number of sign-ups by the number of ad clicks