In a file’s mode, if a permission is unavailable, a(n) ____ character replaces its position in the mode.

In a file’s mode, if a permission is unavailable, a(n) ____ character replaces its position in the mode.

In a file’s mode, if a permission is unavailable, a(n) ____ character replaces its position in the mode.

a. *
b. +
c. ?
d. -

Answer: D.