To mount a file system temporarily, you can use the mount -t command. Let's go through each option to understand why it is correct or incorrect:
A) mount -t - This option is correct because the -t flag is used to specify the file system type. By using this flag followed by the desired file system type, you can mount the file system temporarily.
B) mount -R - This option is incorrect because the -R flag is used to mount a file system read-only, not for temporarily mounting a file system.
C) mount - This option is incorrect because it does not specify the file system type to be mounted. Without specifying the file system type, the command will not be able to successfully mount the file system temporarily.
D) mount -Rt - This option is incorrect because it combines the incorrect options mentioned in options B and C. The -R flag is used for mounting a file system read-only, and the -t flag is used to specify the file system type. Combining them in this way will not result in the desired temporary mounting of a file system.
The correct answer is A) mount -t. This option is correct because it includes the necessary flag to specify the file system type, allowing you to mount the file system temporarily.