What should CK keep in mind about salesforce CDN?

Cloud Kicks (CK) is planning to introduce a User Acceptance Testing (UAT) process to ensure quality. UAT will take place In Partial and Full sandboxes. OC has also set up the Salesforce content Delivery Network (CDN) for its domain in production environment.

What should CK keep in mind about salesforce CDN?
A . Salesforce CDN is only supported in Full sandbox environments.
B. Salesforce CDN is not supported in sandbox environments.
C. Salesforce CDH is only supported in Developer sandbox environments
D. Salesforce CDN is supported in all sandbox environment

Answer: B