Consider a scenario where you are managing a data warehouse containing a table named Stage.Customers. This table stores all customer record updates originating from a customer relationship management (CRM) system. It is common for multiple updates to exist for each customer within this table. Your task is to construct a T-SQL query that retrieves the customer ID, name, postal code, and the most recent update time for each individual customer. To achieve this, how should you complete the code snippet provided below?

WITH CUSTOMERBASE AS ( SELECT CustomerID, CustomerName, PostalCode, LastUpdated, _____() OVER(PARTITION BY CustomerID ORDER BY LastUpdated DESC) as X FROM _____.dbo.CustomerChanges )

SELECT CustomerID, CustomerName, PostalCode, LastUpdated FROM CUSTOMERBASE WHERE __ = 1