What is the appropriate sequence for the elements in a SQL query clause that displays the rows returned in a particular order? Oa. a. command, major sort key followed by operator (if any), minor sort key followed by operator (if any) Ob. b. command, secondary sort key followed by operator (if any), primary sort key followed by operator (if any) Oc. command, operator (if any), major sort key, minor sort key Od. primary sort key followed by operator (if any), secondary sort key followed by operator (if any), command