He supported advances in art, architecture, science, math, and education.
Answer:
B!
Explanation:
Your answer is B (Around 1440) I believe.
Hope this helps you!
Answer - A. Engraving
Simple Explanation Reason - Why it was difficult is because of learning the technique. Since it was less common then Printmaking used with etching.
Credit Researched - Engraving - Wiki-Pedia