What is the correct order in which clay for bricks is prepared?

• A. Cleaning, digging, tempering, weathering, unsoiling and blending
• B. Digging, tempering, cleaning, weathering, unsoiling and blending
• C. Tempering, digging, blending, weathering, cleaning and unsoiling
• D. Unsoiling, digging, cleaning, weathering, blending and tempering