Why would you read a security alert and not just download and install a security update to a key system such as the Linux kernel? (Select three.) A. The update may affect interactions between the...

Why would you read a security alert and not just download and install a security update to a key system such as the Linux kernel? (Select three.)

A. The update may affect interactions between the operating system and local hardware.

B. The update does not affect any systems that you use personally.

C. The update may not be bootable.

D. The update relates to Xen, which is a special kernel not used on the local system.