Which three options are true regarding Grade Ladders? (Choose three.)
A. Five types of Grade Ladders are available.
B. A Grade Ladder can be created with a combination of both grades and grades with steps.
C. A Grade Ladder cannot be created with a combination of both grades and grades with steps.
D. Two types of Grade Ladders are available.
E. Grade Ladders are used to group grades or grades with steps.