15. The main function of the fifth paragraph (the highlighted phrase) is to:
Your Answer is
Correct Answer is D
Explanation
This paragraph mainly introduces that Gomes has found other woods that can replace the endangered woods through experiments.
Item D: "A substitute for precious wood has been discovered through experiments", which is in line with the purpose of the paragraph.
Item A: No mention of master luthier.
Item B: Exploring the limits of science.
Item C: Contrary to the information in the text.