The student realized that so many different people with different jobs are making efforts to prevent and limit pollution in order to protect our environment. Even farmers are finding ways to do this. The table below shows land use for different crops and the yield of each crop for a typical farmer. Crop Yield (bushels/acre)
Soy beans 150
Sweet Potatoes 320
Wheat50
Corn 155
The data in the graph shows the amount of water needed to grow four different crops, each used to produce ethanol, a fuel. For each crop, the data shows how many liters of water are needed to produce one liter of ethanol fuel.

A farmer wishing to have the smallest impact on the environment might choose to grow a crop that would use the least amount of land. Based on the table, which of the following crop yields should the farmer choose?

100 bushels of wheat

160 bushels of sweet potatoes

300 bushels of soy beans

310 bushels of corn