Ordering Service Nodes Also Provide the Following Services EXCEPT

Multiple Choice

Ordering service nodes also provide the following services EXCEPT?

A) Authentication of clients
B) Maintenance of a system chain that defines ordering service configurations, root certs and MSP IDs for authenticated organizations and a grouping of profiles containing the various consortia within the network.
C) Checks the Certificate details and others to validate the transaction.
D) Filtering and validation for configuration transactions that reconfigure or create a channel.