The correct answer is preoperstional
Preoperative stage ranging from two to seven years.
What marks the passage from the sensorimotor period to the preoperative period is the appearance of the symbolic function, that is, it is the emergence of language. In the Piagetian line, language is considered a necessary condition, since the development of language depends on the development of intelligence. As a result, the development of thought gains speed and that is why this is the well-known phase of the famous “whys”.