MCQOPTIONS
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				| 1. | 
                                    Suppose the demand for good Z goes up when the price of good Y goes down. We can say that goods Z and Y are ? | 
                            
| A. | perfect substitutes | 
| B. | complements | 
| C. | unrelated goods. | 
| D. | substitutes. | 
| Answer» C. unrelated goods. | |