Concept:Folder names cannot contain certain characters such as
/ and
:, but spaces and underscores are allowed.
Explanation:I. Black/Stars contains a slash
/, which is not allowed in a folder name.
II. Black:Stars contains a colon
:, which is not allowed in a folder name.
III. Black_Stars contains an underscore, which is allowed.
IV. Black Stars contains a space, which is allowed.
Therefore, the valid folder names are III and IV only.
Answer:C. III and IV only