Yon have created a list item for the Credit_Rating field in the Customers form, the Finance department usually determines a range of scores that pertain to the customer, the values in the list are Excellent, Good, Fair, and Poor, corresponding to the ranges provided by Finance. The default value Fair, because that is the range that applies to most customers.
Sometimes, Finance can provide an exact credit score; so users must be able to enter the exact numerical value if it is known. Often clerks enter the customer data before the performance of a credit check, so they must be able to enter a blank value if the credit rating is not yet determined.
Users want to be able to select a blank value from the list, but the list does not display a blank line for them to select. How can you meet this requirement without changing the default value of the list item?
A. Add a blank line to the list item when you define the static values.
B. Set Mapping of other Values for the Credit_Rating Item to NULL
C. Set the Required property of the Credit_Rating item to No.
D. Delete the NOT NULL constraint for the Credit_Rating Column in the database.
E. You cannot change this type of list item to display a blank value; users must delete the default value records if the credit rating is not known
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