As a consultant you are building a data warehouse for a large government agency, which has many units at different hierarchy levels. Many of the business functions are date related, such as fiscal year$/$month and calendar date. Which of the following is the best solution to handle date related information?

Create a date dimension for each business unit

Create a date dimension for each business function

Create a single date dimension containing fiscal year$/$month and calendar year$/$month mapping only

Create a single date dimension containing values for calendar and fiscal dates