The answer to your question is D.
Answer:
Trial and error mainly, but I would at least change the settings for night time and maybe change the white balance to make it look normal (so it isn't yellow or blue). It's mainly up to the person to decide what is correct for the exposure time and color balance.
Explanation:
Hope this helps!
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
