A capacitance is a circuit component that opposes the change in circuit

Capacitors are used in a variety of electronic circuits, including filters, amplifiers, and oscillators. They are also used in power supplies to smooth out the output voltage.

Option B is incorrect because voltage is the difference in electrical potential between two points. It is not a circuit component.

Option C is incorrect because impedance is the total opposition to current flow in an electric circuit. It is a combination of resistance, capacitance, and inductance.

Option D is incorrect because capacitors do oppose changes in current.