Which file is used to configure the various mounting options of a filesystem upon boot?
a. /etc/mount
b. /etc/fstab
c. /var/filesystem
d. /boot/config

B. /etc/fstab file.

Explanation:

The /var/filesystem file is a subdirectory of the root directory of a linux operating system, used to store files during the operation of a computer system.

The /boot/config file is  a file directory used to store system configuration parameters which can be accessed by the GPU before the installation of the ARM CPU and linux.

The /etc/mount (or /etc/mtab) and /etc/fstab are used to show the list of mounted volumes. The /etc/mtab gives details of already mounted volumes, but the /etc/fstab shows the list of possible volumes to be mounted upon the boot of the system.

building and maintaining the topology is difficult and time consuming. the chance of redundant connections is high, which adds to the high costs and potential for reduced efficiency.

explanation:

it is much more convenient for the consumer to order something online, rather than going to a store. it saves them time and money for them, especially if that item is not accessed easily.