Answer: B. List folder content.
Explanation:
Hanna should assign the "List folder content" permission to the workstations. This will allow the workstations to view the names of files and folders within the directory but prevent them from accessing the internal files, reading or writing their contents, or executing any files.
In summary:
A. Read - Allows reading the contents of files.
B. List folder content - Allows viewing the names of files and folders within the directory.
C. Read & Execute - Allows reading and executing files.
D. Write - Allows creating new files or modifying existing ones.
For Hanna's use case, the correct answer is B. List folder content.