Based on the contents of the CUSTOMERS table, which of the following SQL statements will display the customer# of all customers who were referred by the same individual that referred customer# 1003?

a. SELECT customer# FROM customers WHERE referred =(SELECT referred FROM customers WHERE customer# = 1003);
b. SELECT customer# FROM customers WHERE referred EXISTS(SELECT referred FROM customers WHERE customer# = 1003);
c. SELECT customer# FROM customers WHERE NVL(referred, 0) =(SELECT NVL(referred,0) FROM customers WHERE customer# = 1003);
d. SELECT customer# FROM customers WHERE NVL(referred,0) =(SELECT referred FROM customers WHERE customer# = 1003);


c

Business

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