A 2004 survey of the world\'s nations showed a strong positivecorrelation betwee

Question

A 2004 survey of the world's nations showed a strong positivecorrelation between percentage of a country's citizens using cellphones and life expectancy in the same country, where lifeexpectancy is measured in expected years of life at birth. Choosethe best explanation for this correlation.

a.) 1 Cell phone users cancommunicate more easily with friends; this makes them happier andtherefore they live longer.
b.) Cell phone users tend to bethe younger citizens in acountry.    
c.) Generally favorableeconomic conditions and a high standard of living could affect bothcell phone use and life expectancy.
d.) Criminals fear that whilein the act of committing a crime, a cell phone user will take theirpicture. This reduces the number of crimes, like murder, andtherefore increases life expectancy.
e.) The cell phone companiesare very profitable and therefore can offer employees generoushealth benefits, which increases the country's lifeexpectancy.
f.) Cell phones emit signalsthat kill off defective brain cells, thus increasing the lifeexpectancy of the user.
g.) Owners of cell phones arelikely to also own ipods; listening to their favorite musicincreases the owner's life expectancy. 1

Explanation / Answer

Generally, favorable economic coditions and a high standard ofliving could affect both cell phone use and life expectancy is thebest explanation for this correlation.

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