A series of experiments shows that oil content in a diploid grain is influenced by five genes (a through e) with additive alleles. The highest-producing strain has 20% oil content; the lowest has close to 0%. A plant of unknown genotype has an oil content of 12%. What is a possible genotype for this plant (+ = additive alleles)?
A) a+a+b+b+c+c+d+de+e B) a+a+b+b+ ccddee C) a+a+b+bccddee D) aab+bc+cd+d+e+e+ E) a+a+b+b+c+c+d+dee