The geometric shape of crystals indicate that: A)the atoms which make the mineral can take any form
B)the inside of the crystal is liquid
C)the atoms have an orderly arrangement
D)it was formed from a mold

C) The atoms have an orderly arrangement

Explanation: Every crystal has an orderly, internal pattern of atoms, with a distinctive way of locking new atoms into that pattern to repeat it again and again. The shape of the resulting crystaL-such as a cube (like salt) or a six-sided form (like a snowflake)-mirrors the internal arrangement of the atoms.

b brown mice / white sand dunes

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.