In Linux, what does the right drwxrwxrwt for a folder means?

Question $51$ options:

by adding t right to the folder, a user can only delete or rename the files or subfolders that she or he creates or already owns in that folder

by adding t right to the folder, a user can only delete the files or subfolders that she or he creates or already owns in that folder

by adding t right to the folder, a user can only read the files or subfolders that she or he creates$/$owns in that folder

by adding t right to the folder, a user can only delete or rename any files in that folder