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