What is the main difference between starch and cellulose?

A.starch is a linear arrangement of sucrose units and cellulose is a linear arrangement of glucose units.
B.starch is a linear arrangement of glucose units with alpha linkages and cellulose is a linear arrangement of glucose units with beta linkages.
C.starch is a linear arrangement of fructose units and cellulose is a branched arrangement of fructose units.
D.starch is a linear arrangement of glucose units and cellulose is a branched arrangement of glucose units.