From Observational Research,it Is Clear That the Number of Altercations

From observational research,it is clear that the number of altercations between very young siblings can be very high.Many of these contentious interactions continue during the preschool and the grade-school years.What happens to the behaviour of siblings in these cases?

A) Older siblings tend to become more compliant, whereas younger siblings tend to become more dominant and aggressive.
B) Both the older and the younger siblings tend to become more dominant and less compliant.
C) Older brothers tend to become more dominant and aggressive, whereas older sisters tend to become more compliant.
D) Older siblings tend to become more dominant and aggressive, whereas younger siblings tend to become more compliant.