What's the easiest way to evaluate if one version of your landing page performs better than another for the same ad?

145) What's the easiest way to evaluate if one version of your landing page performs better than another for the same ad?

   A)  Replace the existing landing page with the new one and compare this month's data to last month's
   B)  Run a Campaign Experiment on the existing campaign that switches between both landing pages
   C)  Create another ad group for the new landing page and compare the two ad groups

   D)  Create another campaign for the new landing page and compare the two campaigns