In this excerpt, the verb penetrate conveys the idea the Great Awakening significantly influenced many aspects of American life (option D)
The Great Awakening was a historical period in the colonies that started in 1730. This period was characterized by:
- Increase in religious movements
- Revival of religious ideas
- Spread of religion to other areas
In the text, the author refers to this historical period as "penetrating", this word means "strong" or "powerful".
In this context, the author most like uses the word "penetrate" because this was a powerful movement or because it had a powerful influence on the American life (option D). On the other hand, other options are not correct because they do not define correctly the word penetrating.
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Subject-verb agreement defines whether the verb should have a little change or if it should stay as it is in it base form. When the action is in present tense and the subject is plural, the verb remains the same as it is in its base form. In this case the subject dancers is plural. Therefore, the correct answer is A: The sentence is correct as written.
The answers to your questions are 7: D 8: D 9: A