A high-frequency filter circuit uses a capacitor with a capacitance of 6.8×10−11 F6.8 \times 10^{-11}\text{ F}6.8×10−11 F. Which of the following is equal to this capacitance?
6.8 pF6.8\text{ pF}6.8 pF
68 pF68\text{ pF}68 pF
0.68 nF0.68\text{ nF}0.68 nF
680 pF680\text{ pF}680 pF