Final answer:
The value of the group key is an array
Step-by-step explanation:
The correct statement is: a) The value of the group key is an array.
In the given output, the value of the group key is { "role": "Receivables", "Read-only": [ "Accounting Folder", "Sales Folder" ] } which is indeed an array. It contains two elements: the role of the group and the Read-only folders. The role key has a value of "Receivables" which is a string, and the Read-only key has a value that is an array of strings.
Therefore, statement a) is true.