You're given the output of an Is $-$l of a file in Linux.

ls $-l$ books$\_$file

dr$-$x$-$wxr$--1$ phelan cool$\_$group $0$ Aug $2011$:$10$ books$\_$file

Answer the following question: What does the first character of output signify?

books$\_$file is a disk device

The file owner has delete permissions

books$\_$file is a directory

The file owner is a class D user