The picture below shows a soil texture triangle.

one farmer plans to grow soybean. soybeans grow best in medium loam soil. which of these is the most likely soil sample that the farmer would select to grow soybeans?

a: sample containing 30 percent sand, 35 percent clay, and 35 percent silt
b: sample containing 25 percent sand, 15 percent clay, and 60 percent silt
c: sample containing 40 percent sand, 15 percent clay, and 45 percent silt
d: sample containing 55 percent sand, 30 percent clay, and 15 percent silt