IN LINES 17-18, THE AUTHOR MENTIONS THE "EXPANSION OF HALITE C...

75. In lines 17-18, the author mentions the "expansion of halite crystals...by heating and of sulfates and similar salts by hydration" in order toA. present an alternative theory about crystal growthB. explain how some rocks are not affected by saltC. simplify the explanation of crystal prying and wedgingD. introduce additional means by which crystals destroy rocks