People Diagnosed with Schizophrenia Are More Likely to Have Been

People diagnosed with schizophrenia are more likely to have been born during the winter months.One explanation for this phenomenon is that

A) children born during these months are more likely to be exposed to the flu during the second trimester.
B) cold temperatures slow down neuronal development,leading to a reduction in brain volume.
C) summer heat negatively affects the genetic material in sperm at the time of conception (9 months earlier) .
D) eggs released during the summer-9 months earlier-are more likely to contain genetic errors.