In the two$-$level directory, if a user refers to a particular file then$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

Group of answer choices

only his$/$her own UFD $($user file directory$)$ is searched

first MFD $($master file directory$)$ is searched, then UFD $($user file directory$)$

first UFD $($user file directory$)$ is searched, then MFD $($master file directory$)$

only MFD $($master file directory$)$ is searched