If the resonant frequency is near the harmonic voltage, the resultant harmonic current can _____.

When the resonant frequency is near the harmonic voltage, it can lead to conditions where the harmonic currents are amplified significantly. This amplification occurs because at the resonant frequency, the impedance of the circuit decreases, allowing large currents to flow. If these currents reach a high enough level, they can lead to excessive heating and potentially cause damage to circuit components, including capacitor fuses. Fuses are designed to protect equipment from excessive current; therefore, if the harmonic currents are high enough, they can blow the capacitor fuses as they cannot handle the increased load.

The other possibilities do not accurately describe the consequences of high harmonic currents. The circuit does not stabilize under these conditions, and instead, instability can occur. The efficiency of the system may be negatively impacted due to energy losses and heating, but the direct and most immediate effect of the conditions described is the risk of blowing fuses. Similarly, while power factor could be affected by harmonics, the direct outcome concerning the fuses makes the option about blowing capacitor fuses the most relevant.