If you just memorize a list of words and you don't understand any meanings then their is no point in knowing the work, though you may know the word and now you can use it, you wouldn't be able to use it right because you would use it incorrectlyIf you.
Answer D is merely a statement. Though it may be a true statement this would be advise someone gives making it a non-answer
Using the dictionary doesn't help build vocabulary. It tells you the correct answer and doesn't teach you anything. Using the dictionary let's you get your answer with little to no thinking.
