Answer:
D) Both a and b.
Step-by-step explanation:
COPPA means Children's Online Privacy Protection Act of 1998, it is a federal law in the United States that became effective on April 12 2000. This law is used as pertaining to the collection of personal information of individuals under age 13. For a company that is based in US, it is required that their website must include privacy policy on how to seek parental consent, what this information will be used for, and the responsibility to protect the privacy of children online.
Most companies does not allow children under age 13 to have access to their services because of what it entails in complying with the law.