the masses of all the substances either used up or formed during photosynthesis are shown below: a = 192 grams, b = 108 grams, c = 264 grams, d = 180 grams which of the following statements supports the conclusion that photosynthesis follows the law of conservation? the total mass of b and c, which are water and oxygen, is equal to the total mass of a and d, which are carbon dioxide and glucose. the total mass of b and c, which are water and carbon dioxide, is equal to the total mass of a and d, which are oxygen and glucose. the total mass of a and b, which are water and carbon dioxide, is less than the total mass of c and d, which are oxygen and glucose. the total mass of a and c, which are water and carbon dioxide, is greater than the total mass of b and d, which are oxygen and glucose.