Answer :
"Consequently" means "as a result". When you see it, there's most likely cause and effect going on.
The word that may be a clue that a sentence is inferring cause and effect is: D. Consequently.
Inferring cause and effect is necessary when a writer wants to show that a certain action resulted in another. To give this clue, the word, consequently can be used at the beginning of the sentence.
This word is a pointer that the following sentence is a result of an action that was previously mentioned.
Therefore, option D is correct.
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