Final answer:
Three of the options are valid tagged custom campaigns.
Step-by-step explanation:
Three of the following options are valid tagged custom campaigns:
- www.example.com?utm_medium=email&utm_source=newsletter1&utm_campaign=spring
- www.example.com?utm_medium=referral&utm_source=example&utm_campaign=winter
- www.example.com?utm_medium=cpc&utm_source=mysearch&utm_campaign=spring&utm_term=backpacks