A Company Uses a 7-Digit Number to Identify Customers

Multiple Choice

A company uses a 7-digit number to identify customers. For example, the customer 1532789 indicates the following information: digits 1-2, state, 15 = Georgia
Digit 3, type of organization, 3 = government agency
Digit 4, credit terms, 2 = 2/10, n/30
Digits 5-7, unique customer identifier, 789
This type of coding scheme is:

A) hierarchical
B) block
C) significant digit
D) sequential