To get to the top of the mountain, Charlie drove 6 miles east and 8 miles south. Then he hiked the rest of the way to the top which was about 2 miles high. Assuming Charlie started at (0, 0, 0), what is the total distance he traveled to the top of the mountain?

a.) 8.7 miles
b.) 12 miles
c.) 10.2 miles
d.) 16 miles