Data from the years 2000 through 2009 shows a strong, positive association between consumption of cheese (in U.S. per capita pounds per year) and the number of people who died by becoming entangled with their bedsheets (raw number per year). A timeplot shows very similar trends in both variables. This study
A) is an observational study with lurking variables that affect both of the ones observed.
B) shows that getting tangled in your bedsheets causes death from eating cheese.
C) Uses timeplots, which are only good for one quantitative variable at a time.
D) is an experiment showing that eating cheese causes people to die by becoming entangled in their bedsheets.