Data Warehousing - Cube Cuboids

问题

Consider a cube defined on the following dimension hierarchies:

{customer < customer_street < customer_city < customer_state}

{supplier < supplier_city < supplier_state}

{day < month < quarter < year}

{product < product_line < product_category}

The number of cuboids that contain the supplier and quarter attributes is:

(a) 96

(b) 12

(c) 20

(d) 144

What is the answer and why?

来源：https://stackoverflow.com/questions/59297050/data-warehousing-cube-cuboids