The correct answer is B) oppose any change in circuit voltage. In an AC (alternating current) circuit, capacitance opposes any change in the circuit voltage. This is because a capacitor stores energy in the form of an electric field, and when the voltage in the circuit changes, the capacitor experiences a change in its stored energy, which creates a voltage drop across the capacitor that opposes the change in the circuit voltage. The other options are incorrect because: A) a capacitor does not rectify the current, it allows the current to flow in both directions; C) a capacitor does not stop current flow once it is fully charged, it continues to allow current flow; and D) a capacitor allows current flow in both directions, not just one.