In Various Crosses Examining Three Different Drosophila Traits,you Find the Following

In various crosses examining three different Drosophila traits,you find the following ratios: 9:3:4,9:7,and 12:3:1.What kind of epistasis is each?

A) recessive epistasis,dominant epistasis,duplicate recessive epistasis
B) dominant epistasis,duplicate recessive epistasis,recessive epistasis
C) recessive epistasis,duplicate recessive epistasis,dominant epistasis
D) duplicate recessive epistasis,dominant epistasis,recessive epistasis
E) dominant epistasis,recessive epistasis,duplicate recessive epistasis