Chemical changes

READ -
Aaron is making molasses cookies. The pieces of dough
he puts on the cookie sheet are large, soft, dark brown
blobs that smell like spices. While baking, the dough
undergoes a chemical change, resulting in baked
cookies that are flat, hard, dark brown disks that smell like
spices.

question -
Which properties are different between the product and the reactant? check all that apply

a. shape
b. hardness
c. color
d. odor
e. conductivity