Physical properties are used to classify and compare substances. Physical properties can include density, thermal conductivity, electrical conductivity, solubility, magnetism, melting point, and boiling point. Which statement is correct about all of these physical
properties?

A.) They are independent of the amount of the sample present.
B.) they involve a change in the identity of matter.
C.) they involve the production of new substances
D.) They can be measured only after a change in identity