Which of the following Digital marketing statements are correct?

A. Click through Rate is calculated by dividing the total number of clicks by the total number of ad impressions.

B. Long tail keywords are general key words which draw lower customer traffic.

C. Adwords is Google's earned search marketing programme.

D. Search Engine Marketing includes both search engine optimization and paid search.

E. Ad Auction is the process that Google runs for every Google search to decide which ad must appear for that specific search and in which order these set of ads will be displayed.

Choose the most appropriate answer from the options given below: