Which of the following is true regarding the relationship between gender and aggression in middle to late childhood?
a. There is a general trend of boys being more physically aggressive than girls in middle to late childhood.
b. The relationship between gender and aggression in middle to late childhood varies based on individual differences and environmental factors.
c. Research consistently shows that girls are more verbally aggressive than boys in middle to late childhood.
d. Gender has no significant impact on aggression levels in middle to late childhood.