question: defendant:court:criminal
choices.label: A B C D
choices.text: river water:hydropower station:alternating current investor:market:consumer high school students:study:college students seed:experimental field:crop
explanation: A "criminal" is a "defendant" who is found guilty after being tried in a "court". A "defendant" is the object of the "court" judgment. A "court" is a place where the "defendant" is judged as a "criminal". "alternating current" is generated by "river water" through a "hydropower station". the main body of the "market" includes "investors" and "consumers", and "investors" and "consumers" are the same category. "high school students" need to "study" to become "college students", but "study" is not the place where "high school students" become "college students". the "seed" grows into a "crop" after being cultivated in the "test field", and the process of "seed" becoming a "crop" needs to be carried out in the "test field".
relation: investor consumer R2.4