48.Archeologists spend long days of hard work preserving the record of past life. (1) There the archeologists examine them in detail and write their reports. (2) They first use brushes to clean the soil away from an object as it comes out of the ground. (3) The objects are carefully removed from the soil and brought to the laboratory. (4) So we can understand about the daily activities and social customs of countless ordinary people in the past. (A) 1243 (B) 4123 (C) 3241 (D) 2314