Which of the following is a valid tagged custom campaign

example.com?utm_medium=cpc&utm_source=mysearch&utm_campaign-spring&utm_term=backpacks
example.com?utm_campaign=fall&utm_medium=email&utm_source=newsletter1&utm_content=a1
example.com?utm_medium=email&utm_source=newsletter1&utm_campaign=spring
example.com?utm_medium=referral&utm_source=example&utm_campaign=winter
All of these are valid