What are the different between SSL and S-HTTP?

A.
SSL operates at the network layer and S-HTTP operates at the application layer

B.
SSL operates at the application layer and S-HTTP operates at the network layer

C.
SSL operates at transport layer and S-HTTP operates at the application layer D. SSL operates at the application layer and S-HTTP operates at the transport layer

Explanation:
Whereas SSL is designed to establish a secure connection between two computers, S-HTTP is designed to send individual messages securely. S-HTTP is defined in RFC 2660