What is the difference between a crystalline and an amorphous solid? A crystalline solid

• A.has cubic structure while amorphous solid has hexagonal structure
• B.has regularly-repeating pattern while an amorphous solid has not
• C.is white while amorphous solid is yellow
• D.is always hard while amorphous solid is always soft
• E.melts on heating while an amorphous solid sublimates on heating.