16. The diameter of machine screw is about 6.5 x 10-2 millimeter. Is it more appropriate to report the diameter of the machine screw as 6.5 x 10-2 millimeter or 6.5 x 10-meter? Explain your reasoning.

a. 6.5 x 10-2 millimeter; the number is very small, so choosing a smaller unit of measure is more meaningful.
b. 6.5 x 10-meter; meter is a larger measurement, so choosing a larger unit is more meaningful.
C. none of these
d. not enough information given