Which of the following would be the best soil for gardening? . a] a soil that is 35 percent sand, 30 percent clay, and 35 percent silt. b] a soil that is 10 percent sand, 80 percent clay, and 10 percent silt. c] a soil that is 5 percent sand, 20 percent clay, and 75 percent silt. d] a soil that is 85 percent sand, 10 percent clay, and 5 percent silt.