The correct answer is A) embodied cognition.
What contributes to a child's quicker reaction time is embodied cognition.
Embodied cognition says that human cognition receives the influence of all the organs of the body. In simpler terms, this means that the body influences the mind to react accordingly to any specif situation. Scientists and scholars affirm that with the pass of time, the human body is slower to react due to the loss of brain connection to the parts of our body, making reactions slower than children's reactions.
That is why adults are recommended to exercise the mind and the body to maintain a healthier lifestyle.