Question: which fast food restaurants are the unhealthiest?
Answer: Sonic. Nearly 50 percent of Sonic Corp (NASDAQ: SONC)'s menu items contain at least 1 gram of saturated fat, and 10 of Sonic's hamburgers have more than 1,100 calories, making Sonic the least healthy fast-food chain on 24/7 Wall St.'s list. Carl's Jr. ...  Whataburger. ...  Quizno's. ...  Arby's. ...  Jack in the Box. ...  Wendy's. Chick-fil-A. ...