A group of students measured the density, the state of matter at 25 degrees Celsius, reactions with water, and reactions to a flame and recorded the data in the table below: chart of data Based on the results, what can be determined about the substances?

a. All substances experienced a chemical change.

b. Argon did not experience a chemical change.

c. Only Hydrogen gas and Sodium experienced a chemical change.

d. Only sodium experienced a chemical change.