Universal containers is building an integration between salesforce and their accounting system. the integration will utilize outbound messaging with call back pattern to salesforce. the security officer would like to understand the authentication solution. what are the three ways that the call back can authenticate itself to salesforce? choose 3 answers a. utilize the enterprise wsdl login() operation to obtain a new session id. b. utilize an oauth username-password flow to obtain a new oauth token for the session id. c. utilize the rest api login() operation to obtain a new session id d. utilize the session id contained within the outbound message notification as the authorization header. e. utilize the partner wsdl with oauth to obtain a valid oauth token for the session id. a, c,d which mechanism should an integration architect recommend to make a secure, authenticated connection to a remote system that results in the remote system trusting salesforce?