Use the following dictionary entry to answer the question below. grade (greyd) n. 1. a certain division of a school according to the age or progress of the students n. 2. inclination with the horizontal of a plane v. 3. to assign a mark that indicates the level of quality of a student's work v. 4. to reduce the level of inclination 50 Which definition of grade is used in the following sentence? The contractors had to first grade the site before construction of the new building could begin. A. 1 B. 3 C. 4 D. 2