Chlamydomonas,although a Green Alga,is Sensitive to an Antibiotic,erythromycin

Chlamydomonas,although a green alga,is sensitive to an antibiotic,erythromycin.If mt⁻ mating-type alga that is sensitive is mated with an mt⁺ cell that is resistant,and if the mt⁺ strain donates chloroplasts,what results do you expect and why?

A) All progeny are sensitive because this is the dominant trait.
B) Approximately half the progeny are sensitive because this is the recessive trait.
C) All the progeny are sensitive because this is the recessive trait.
D) All progeny are resistant because cpDNA is responsible.
E) Approximately half the progeny are sensitive because cpDNA is responsible.