I think its C.
I hope this helps and please do correct me if im wrong.
51
hope that helped you on your journeys
The property of all ionic compounds that makes chalk particularly useful for writing on a chalkboard is : Hardness and Brittleness
Those properties make chalk leaves residues on the board every time friction happen between the chalk and the board
hope this helps<span />
Storing energy because it’s not with the other energy