Analyze each of the following investigations, or arguments, and indicate which of the methods of causal reasoning—Mill’s methods—are being used in each of them:

Speed kills. A report from the Insurance Institute for Highway Safety, issued in November of 2003, concluded that increased speed limits on Interstate highways led to nearly 1,900 additional deaths in 22 states from 1996 to 1999. The report is based, oddly, on a study by the Transport Safety Authority of New Zealand, working in the United States, which showed that, when the Federal cap on speed limits was placed at 65 mph, the number of deaths on U.S. highways decreased. But almost immediately after the repeal of that Federal cap on speed limits the number of deaths in the states that did not retain the 65 mph limit increased markedly, while the number of deaths in those states that retained the 65 mph limit did not increase.
Drivers in states with higher speed limits, the study showed, drive faster, and where the driving is faster the number of traffic fatalities goes up.
—“Study Links Higher Speed Limits to Deaths,”
The New York Times, 24 November 2003