Which of the following is a valid tagged custom campaign?
- A) www.example.com?utm_campaign=fall&utm_medium=email&utm _source=newsletter1&utm_content=a1
- B) www.example.com?utm_medium=referral&utm_source=example& utm_campaign=winter
- C) www.example.com?utm_medium=cpc&utm_source=mysearch&ut m_campaign=spring&utm_term=bacpacks
- D) www.example.com?utm_medium=email&utm_source=newsletter1&utm_campaign=spring
E) All of these are valid.
