Answer:
C). Added introductory words or phrases.
Explanation:
Introductory words or phrases are described as the adverbs or interjections that are primarily employed to introduce a sentence in order to establish connectivity between the ideas and ensure a smooth transition.
In the given sentence, 'introductory words or phrases' have been added to revise the sentence. The introductory word 'because' functions to link the two ideas(I studied hard and I did well on the exam') together in a cause-and-effect structure. <u>It converts the first clause('I studied hard') into a 'dependent clause'('Because I studied hard') that is setting the stage for main clause to ensure a smooth transition between ideas and enhance its efficacy</u>. Therefore, <u>option C</u> is the correct answer.
The answer is D. *puts more words in because it has to be 20 letters or more*
It would be bite back hope this helps
