Expand and combine like terms. ( (9c² c⁶)(9c² - c⁶) )
a. ( 81c⁸ - 9c¹⁴ )
b. ( 81c⁸ - 81c¹⁴ )
c. ( 81c⁸ + 9c¹⁴ )
d. ( 81c⁸ + 81c¹⁴ )