Policy analyst: In medical records, the number of items indicating that patients had died as a result of tobacco use was higher this decade than it had been in previous decades. Regions that produce tobacco reported the end of agricultural shortages at the beginning of this decade, so it is likely that the rising number of fatalities can be attributed to an increase in the supply of tobacco products.
Which of the following, if true, most seriously undermines the policy analyst’s argument?
【选项】
The average length of agricultural shortages has been consistently decreasing over the last decade in the regions of tobacco production.
选项是否正确？