Which of the following describes an 'effective teacher' in the context of teaching the principles of electricity?
ASomeone who has a deep theoretical knowledge of all electrical engineering principles and formulas.
BSomeone who primarily uses advanced laboratory equipment and digital simulations in every class.
CSomeone who strictly adheres to the textbook and ensures students memorize all electrical laws and equations.
DSomeone who is skilled at explaining complex concepts in multiple ways using different analogies and models.