OKLAHOMA CITY, 2016-Oct-10 — /EPR Retail News/ — SONIC® Drive-In (NASDAQ: SONC), the nation's largest chain of drive-in restaurants, presented nine achievement awards to franchisees and team members at the 2016 SONIC National Convention in Nashville, Tenn. Every year, SONIC awards exemplary individuals and groups to show appreciation to those who have a proven track record of…