The private, commercial seed industry primarily sold publicly developed seed types until the 1930s, when what three seed products came onto the market?
Ohybridized corn, sorghum, and sunflower seeds
O cocoa beans, almonds, and cashews
O lentils, soybeans, and peanuts
O corn, oats, and barley

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.