Soru

Read the passage below carefully and answer the question that follows:

For generations, sesame farmers in the riverine belt of Benue State relied on open-air sun drying on bare earth, leaving harvested seeds vulnerable to unexpected downpours and soil contamination. To counter these persistent post-harvest losses, local agricultural extension officers introduced raised wooden drying racks fitted with permeable mesh screens, alongside low-cost moisture meters. While initial adoption was sluggish due to skepticism regarding construction costs, participating farmers quickly noticed a distinct improvement in seed purity and a significant drop in mold infestation. Consequently, commercial buyers from urban export hubs began offering a twenty percent price premium for seeds dried on these raised platforms. Within two harvest cycles, non-participating neighbors rapidly copied the design using locally sourced bamboo, despite receiving no formal training from the extension service. Surprisingly, even though overall regional sesame output remained relatively stable, the total volume of export-grade sesame entering the market doubled within three years.

Based on the passage, what can be logically inferred about the cause of the doubled export-grade sesame volume?