Need some help solving this multiple choice question:

Please find the appropriate text that closest describes or defines the word item a known weakness in a system IPS Authentication Vulnerability Access Control HIDS Threat Hash Virus/Worm Encryption Authorization a danger that exploits a weakness in a system a program that causes damage to a system D. E. F. G. measures use to restrict the levels of accessH an act of determining the level of access granted to an individual verifying an individual's identity to an individual a software/hardware devices used to monitor intrusions to a single system devices used to monitor and prevent intrusions process of tranforming information to protect it process of transforming information in order to create a unique signature