Based on the structure of the CUSTOMERS table, which of the following is a valid SQL statement?

a. CREATE PUBLIC INDEX customers_name_idxON customers (lastname, firstname);
b. CREATE PUBLIC INDEX customers_name_idxON customers (lastname);
c. CREATE INDEX customers_name_idxON customers (lastname, firstname);
d. CREATE PUBLIC INDEX customers_name_idxFOR customers (lastname);


c

Business

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