A．wheat, soybeans, carrot and lettuceB．soybeans, tomatoes, carrot and wheatC．white potatoes, carrot, lettuce and soybeansD．wheat, soybeans, lettuce and white potatoes
A．wheat, soybeans, carrot and lettuce
B．soybeans, tomatoes, carrot and wheat
C．white potatoes, carrot, lettuce and soybeans
D．wheat, soybeans, lettuce and white potatoes