A – Wrong
The truth is that children are less carefree today than they were in the past. Statement A is the opposite.
B – Wrong
Clearly wrong. The text focuses on children and not chocolate.
C – Wrong
Clearly wrong. The text focuses on children and not blondes having more fun.
D – Correct
Clearly the correct answer. The text entirely focuses on the importance of relationships when it comes to children. Today, children are less carefree than before.