Which of the following initializes the variable order?
A. DECLARE
order NUMBER(2);
departure DATE;
BEGIN
---- executable statements ---
END;
B. DECLARE
order NUMBER(2) = 0;
departure DATE;
BEGIN
---- executable statements ---
END;
C. DECLARE
order NUMBER(2) =: 0;
departure DATE;
BEGIN
---- executable statements ---
END;
D. DECLARE
order NUMBER(2) := 0;
departure DATE;
BEGIN
---- executable statements ---
END;
Answer: D
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