What action is required when you receive the connectivity error ICM_HTTP_SSL_ERROR in SAP Sales and Service Cloud?

What action is required when you receive the connectivity error ICM_HTTP_SSL_ERROR in SAP Sales and Service Cloud?
A . Request and upload a new client certificate from the certificate authority
B . Upload the client certificate to the communication arrangement
C . Change the URL to use HTTPS
D . Upload the root certificates to the SAP Sales and Service Cloud trust store

Answer: D