What is the value of
customer_id within the nested block in the example below?
/* Start main block */
customer_id NUMBER(9) := 678;
credit_limit NUMBER(10,2) := 10000;
/* Start nested block */
customer_id VARCHAR2(9) := 'AP56';
current_balance NUMBER(10,2) := 467.87;
-- what is the value of customer_id at this point?
Please select the best answer.