Which of the following describes an 'effective teacher' in the context of teaching the principles of electricity?
ASomeone who has an excellent understanding of all electrical theories and can solve any related problem quickly.
BSomeone who maintains strict classroom discipline and conducts frequent tests to assess student understanding.
CSomeone who ensures the entire syllabus is covered thoroughly and provides detailed notes for every topic.
DSomeone who is skilled at explaining complex concepts in multiple ways using different analogies and models.