The table below provides Mountain Mack's production possibilities schedule, which describes various combinations of fishing lures and duck decoys he can carve efficiently in a week. Mountain Mack's Production Possibilities Schedule Fishing Lures Duck Decoys $400321024201630840050$ Which of the following combinations of fishing lures and duck decoys is unobtainable to Mountain Mack in one week's worth of carving? multiple choice $140$ fishing lures and $0$ duck decoys $16$ fishing lures and $30$ duck decoys $20$ fishing lures and $10$ duck decoys $10$ fishing lures and $40$ duck decoys c$.$ Which of the following combinations of fishing lures and duck decoys is an efficient combination? multiple choice $216$ fishing lures and $30$ duck decoys $50$ fishing lures and $0$ duck decoys $20$ fishing lures and $10$ duck decoys $10$ fishing lures and $40$ duck decoys