15. The main function of the fifth paragraph (the highlighted phrase) is to:

Answer and Explanation

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.