Answer:
(c. The distance across a skin cell.)
Explanation:
![3*10^-5 = 0.000003](https://img.qammunity.org/2022/formulas/mathematics/college/u7x3ury0nfb91orqj1bejiejep87gx70ij.png)
This number is quite small, meaning that it would be best suited for measuring a small object. One of the options that fits this criterion is option C, (The distance across a skin cell). Thus the answer is (c. The distance across a skin cell.)