Answer: Option (C) is the correct answer.
Step-by-step explanation:
The term IQ stands form intelligent quotient. When a child is provided with stable home environment in which there are less or rare conflicts, happy environment, understanding between individuals etc will lead to a stable growth of child.
Also, varied activities will help child to learn quickly and develop various skills.
Thus, a stable home and varied activities is the one parenting factor which is associated with improved IQ scores in children.