A Series of Experiments Shows That Oil Content in a Diploid

Multiple Choice

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 is 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