Which property should the students test to find out which compound has the strongest intramolecular forces and why? A Density because the substance with the highest density has the strongest forces of attraction. B Boiling point because the substance with the lowest boiling point has the strongest forces of attraction. C Melting point because the substance with the highest melting point has the strongest forces of attraction. D Surface tension because the substance with the least surface tension has the strongest forces of attraction.