It has been known that if the w gene in the fruit fly works, the male fruit fly will not court the female fruit fly and instead pursue the same sex. Therefore, the homosexual behavior of the fruit fly is considered to be determined by genetic factors. Recently, researchers Male fruit flies with the w gene function were cultivated, and experiments were performed using this fruit fly. They found that the homosexual behavior of fruit flies was not only affected by genetic factors, but also played a significant role in promoting social factors. Which of the following, if true, would best support researchers' findings? ['If this male fruit fly emerges as an adult, as long as it is collectively raised for more than one day, the male fruit fly will start chasing other female fruit flies and show courtship behavior; but if this fruit fly emerges, it will only isolate itself. Rearing, this behavior does not occur.', 'If this male fruit fly emerges in isolation and is reared in isolation, after several days, the fruit fly begins to show courtship behavior to other male fruit flies; if this male fruit fly emerges as an adult, it is collectively reared , This behavior does not occur.', 'If this male fruit fly emerges as an adult, as long as it is collectively raised for more than one day, the male fruit fly will start chasing other male fruit flies, showing homosexual courtship behavior; but if this fruit fly emerges as a Such behaviors will not occur if they are kept in isolation.', 'If this male fruit fly emerges in isolation and is kept in isolation, a few days later, the fruit fly begins to show courtship to other female fruit flies; if this male fruit fly emerges as an adult, it is collectively reared , This behavior does not occur.']