Under metamorphic conditions, limestone will change into marble. The main metamorphic process involved in this change is recrystallization. Which of the following best describes recrystallization?
a. The calcium carbonate in the original limestone chemically reacts with other minerals in the limestone to form new minerals
b. Dissolution and re-precipitation of calcium carbonate in moisture in the rock causes the crystals to grow and change their shape and size
c. Water from carby hydrothermal vents enters the rock, carrying exotic elements which chemically react with the calcium carbonate in the limestone and form new minerals
d. The calcium carbonate in limestone does not change much from the parent rock
