A I'm sure it's helps keep the button on slik is too soft wood would not help a smaller button wouldn't help so A is the correct answer
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
Can't see the options/choices you have to choose from but I do know that Greek sculptures primarily focused on knowledge of math and the knowledge to use perfectly aligned proportions such as the facial features , but they added these while still showing features that would be described as imperfect . This gave their sculptures a feeling of unity and "perfect imperfections.
