Which of the Following Statements Regarding Individuals Who Are Fy(a-B-)

Which of the following statements regarding individuals who are Fy(a-b-) is true?

A) The presence of Fy^b in the tissue of individuals who are black who are Fy(a-b-) prevents those individuals from forming Anti-Fy^b.
B) The presence of Fy^a substance in individuals who are white who are Fy(a-b-) prevents those individuals from forming Anti-Fy^a.
C) All individuals that are Fy(a-b-) are likely to form anti Fy^b if exposed to the Fy^b antigen.
D) Anti Fy^b can only be produced from individuals that have inherited the Duffy gene.