Ateam of researchers developed a new chemical for use as antifreeze in car engines. the engineers believe that when the chemical is added to water, the water will freeze at a lower temperature. which step must the researchers take before they can consider the product successful? a) they must measure the freezing point of the chemical. b) they must study the chemical in several kinds of car engines. c) they must measure the freezing point of water with the chemical added to it. d) they must vary the concentration of the chemical to produce different mixtures.