The file command will not update the modify timestamp on the file /tmp/myfile.txt because it only reads the file content and determines its type. It does not write or change anything in the file.
The other commands will update the modify timestamp on the file /tmp/myfile.txt because they either overwrite the file content (B and C), append to the file content (D), or explicitly change the file timestamp (E).

The daemon that handles power management events on a Linux system is acpid. A daemon is a background process that runs continuously and performs certain tasks without user intervention. The acpid daemon listens for power management related events, such as switching between AC and battery power on a laptop, pressing the power button, closing the lid, etc., and executes various commands in response. The acpid daemon can be configured by editing the files in /etc/acpi/events and /etc/acpi/actions directories, or by using a graphical tool like gnome-power-manager or xfce4-power-manager. The acpid daemon is part of the 101.1 Determine and configure hardware settings topic of the LPI Linux Essentials certification program12. References:
* Linux Essentials - Linux Professional Institute Certification Programs1
* Exam 101 Objectives - Linux Professional Institute2
* Power management - ArchWiki2
* 9.12. Power Management: Advanced Configuration and Power Interface (ACPI)

The following commands are used to modify quota settings:
* B. setquota: This command is used to set disk quotas for users or groups on a filesystem. The setquota command requires the user or group name, the soft and hard limits for blocks and inodes, and the device name or mount point of the filesystem as arguments. For example, to set a quota for user sammy with a 100MB soft limit and a 110MB hard limit for blocks, and a 1000 soft limit and a 1100 hard limit for inodes on the /home filesystem, use the following command:
sudo setquota -u sammy 100M 110M 1000 1100 /home
* C. edquota: This command is used to edit disk quotas for users or groups on a filesystem. The edquota command opens an editor, such as nano or vi, with the current quota settings for the specified user or group. You can then modify the settings as you wish, and save and exit the editor to apply the changes.
For example, to edit the quota for user sammy on the /home filesystem, use the following command:
sudo edquota -u sammy
This will open an editor with the following content:
Disk quotas for user sammy (uid 1000): Filesystem blocks soft hard inodes soft hard /dev/vda1 40 0 0 13 0 0
/dev/vda2 1024 102400 112640 10 1000 1100
You can then change the values as you wish, and save and exit the editor to apply the changes.
The other options are not valid commands or options. The editquota and quotaedit commands do not exist on a standard Linux system. The quotaset command is a synonym for setquota, but it is not commonly used.
References:
How to Configure/Setup Disk Quotas in Linux | 2DayGeek
setquota(8): set disk quotas - Linux man page
edquota(8): edit user/group quotas - Linux man page

The commands that will print important system information such as the kernel version and machine hardware architecture are uname and arch. The uname command prints system information, such as the kernel name, release, version, machine, processor, hardware platform, and operating system. The arch command prints the machine hardware name, which is equivalent to uname -m. For example, uname -a will print Linux 5.10.0-8- amd64 #1 SMP Debian 5.10.46-4 (2021-08-03) x86_64 GNU/Linux, and arch will print x86_64. The sysinfo command is not a valid Linux command. The lspci command prints information about PCI buses and devices in the system. The info command prints documentation for a given topic or command. References: LPI Exam
101 Detailed Objectives, Topic 103: GNU and Unix Commands, Weight: 25, Objective 103.1: Work on the command line, uname command, arch command, lspci command, info command