In an effort to combat three consecutive years of boll weevil infestations, cotton farmers have started using Eradicon, a chemical just released to market, capable of emitting an odor that effectively repels the boll weevil. The agricultural board expects that cotton production on those farms using Eradicon will return to levels similar to those from three years ago.
Which of the following, if true, does the most to weaken the agricultural board's expectations?
A) Eradicon has been proven to repel boll weevils in a laboratory setting.
B) Those cotton farmers who chose not to use Eradicon tended to witness a greater drop in cotton production during the last three years than those who started to use Eradicon.
C) Most boll weevil infestations happen in the early spring, when cotton plants are highly vulnareble.
D) When used for more than a week, Eradicon begins to rob the ground of nitrates, without which cotton plants cannot adequately grow.
E) Farmers need to spray Eradicon on their fields once every few days for it to be effective.