Becoming an opera singer isn't a dream for Macfarlane because()

A、someonehadtoldhimthathewasntgoingtobeanoperasinger
B、anoperasingerwasnotwelcomedbyhisclassmatesatschool
C、heneverthoughtthatoperasingerwouldbehisful-timecareer
D、hedidntwanttosinghisfirstoperaatSydneysOperaHouse