B because it is the only word meaning cause and effect
Dr. López has probably found
"mirror neurons".
A mirror neuron is a neuron that flames both when a creature acts and when the creature watches a similar activity performed by another. Hence, the neuron "mirrors" the conduct of alternate, as if the onlooker were itself acting. Such neurons have been straight forwardly seen in primate species.
The meaning I know, is to make a hole. or the other definition is to remove earth carefully for a reason such as to find remains.