While having a gene for Parkinson’s disease guarantees that Parkinson’s disease will develop, this is not the only factor that can lead to Parkinson’s disease. In other words, the presence of the gene is a ________, but not a ________.
A. risk factor; sufficient cause
B. sufficient cause; necessary cause
C. necessary cause; risk factor
D. contributory cause; sufficient cause
Answer:B
While having a gene for Parkinson’s disease guarantees that Parkinson’s disease will develop, this is not the only factor that can lead to Parkinson’s disease. In other words, the presence of the gene is a ________, but not a ________.
A. risk factor; sufficient cause B. sufficient cause; necessary cause C. necessary cause; risk factor D. contributory cause; sufficient cause