单项选择题 A new virus is spreading via email and exploits an old vulnerability in a company’s main OS.Which of the following BEST helps to mitigate this type of threat（）

单项选择题 Please be aware that if you do not accept these terms you will not be allowed to take thisCompTIA exam and you will forfeit the fee paid.（）

单项选择题 Which of the following is needed to recover a system using ERD?（）