Question ID:PT55 S1 Q9 Passage:Several major earthquakes have occurred in a certain region over the last ten years. But a new earthquake prediction method promises to aid local civil defense officials in deciding exactly when to evacuate various towns. Detected before each of these major quakes were certain changes in the electric current in the earth's crust.  Stem:Which one of the following, if true, most weakens the argument? Correct Answer Choice:DChoice A:Scientists do not fully understand what brought about the changes in the electric current in the earth's crust that preceded each of the major quakes in the region over the last ten years. Choice B:Most other earthquake prediction methods have been based on a weaker correlation than that found between the changes in the electric current in the earth's crust and the subsequent earthquakes. Choice C:The frequency of major earthquakes in the region has increased over the last ten years. Choice D:There is considerable variation in the length of time between the changes in the electric current and the subsequent earthquakes. Choice E:There is presently only one station in the region that is capable of detecting the electric current in the earth's crust.