39. If the writer were to delete the underlined portion (adjusting the punctuation as needed), the essay would primarily lose:
Your Answer is
Correct Answer is C
Explanation
The added sentence is an explanation of the scientific fields, so item C is correct.
Item A: skepticism is not mentioned.
Item B: in modern life is not mentioned.
Item D: today is not mentioned, the sentence is in the past tense, so it is not an application to the present.