Which one of the following most accurately describes the author's attitude toward the value of heirloom crops?

So I have a question about this one. I picked Answer Choice "C". I used the last line of the passage which reads, "These recent developments have made clear that immediate steps must be taken to preserve indigenous knowledge systems and integrate them with programs for the conservation of diverse crop genetics thus bolstering the long-term sustainability of the continent's agricultural systems." Answer Choice A is out because I didn't feel or see that "certainty" was ever communicated in the passage, nor was relief in Answer Choice "B" or pride in Answer Choice "D" but "E" was tempting. Can someone explain to me why "E" is incorrect, please?