Which of the Following Statements Accurately Describe Null Field Values

Multiple Choice

Which of the following statements accurately describe null field values? Select all the options that apply.

A) You enter a null value by typing two quotation marks ("") .
B) A null field value indicates unknown data.
C) You can use the Is Null criterion to select records with null values.
D) You enter a null value by leaving a field blank in a record.