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

Multiple Choice

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