Please Use the Following Information to Answer the Question(s) Below

Please use the following information to answer the question(s) below.
Feather color in budgies is determined by two different genes, Y and B, one for pigment on the outside of the feather and one for the inside. YYBB, YyBB, or YYBb is green; yyBB or yyBb is blue; YYbb or Yybb is yellow; and yybb is white.
-A blue budgie is crossed with a white budgie. Which of the following results is possible?

A) green offspring only
B) yellow offspring only
C) blue offspring only
D) blue and white offspring
E) a 9:3:3:1 ratio