What should be done in order to successfully execute the script?

The current directory contains the following file:

-rw-r―r― 1 root exec 24551 Apr 2 12:36 test.sh

The file contains a valid shell script, but executing this file using ./test.shleads to this error:

bash: ./test.sh: Permission denied

What should be done in order to successfully execute the script?
A . The file’s extension should be changed from .sh to .bin.
B . The execute bit should be set in the file’s permissions.
C . The user executing the script should be added to the exec group.
D . The SetUID bit should be set in the file’s permissions
E . The script should be run using #!./test. shinstead of ./test.sh.

Answer: B