Meteorologist: The number of tornadoes reported annually has more than doubled since the 1950s. But their actual number has probably not increased. Our ability to find tornadoes has improved, so we' re probably just finding a higher percentage of them than we used to. Which one of the following, if true, provides the most support for the meteorologist's argument?
A: The annual number of deaths due to tornadoes has increased steadily since the 1950s.
B: The number of tornadoes hitting major population centers annually has more than doubled since the 1950s.
C: The geographic range in which tornadoes are most prevalent has remained roughly constant since the 1950s.
D: The number of large and medium sized tornadoes reported annually has remained roughly constant since the 1950s.
Choose A, B, C or D as your solution.
D