A tossup between soybeans and sorghum (I had to look that up for reference). Sorghum gets my relatively uneducated vote because of
[it] was once the predominate table sweetener in the U.S. Today, sweet sorghum is used as a healthy alternative sweetener to produce whiskey and rum type products and for biofuel and chemical production.
When visiting a never before art museum on the scale of the Met:
Guided tour by a docent or explore it by yourself armed with one of those audio guided tours?