Why was lapis lazuli used only in the most
important artwork?

c

Explanation:

because it can enchant any tools you have  

Explanation:

but for real

Ground lapis lazuli was increasingly used by painters during the 13th and 14th centuries to make ultramarine and Cennino Cennini gives instructions on how to prepare this pigment in his “Book of Arts.” But it was not until the second half of the 16th century that large objects carved from lapis began to appear in Italy.

the answer is a. for apex ur welcome

answer; i believe that the correct answer is (chronological order);