For which two reasons would you define Network ACLs?

A: for configuring fine-grained access control for users and roles that need to access external network services from the database B: for configuring fine-grained access control to Oracle wallets to make HTTP requests that require password or client-certificate authentication C: to create auditing policies regarding the usage of network services from the database D: to block network attacks or denial of service attacks directed at the database E: to Improve the performance of the database applications that require access to remote network services