Which component often does not mitigate problems related to harmonic distortion?

The K-rated transformer is specifically designed to handle non-linear loads and the harmonic currents produced by them, making it less effective at mitigating existing harmonic distortion compared to the other components listed.

K-rated transformers are built to handle the additional heating that non-linear loads can introduce due to harmonic currents; however, they do not actively reduce or filter harmonic distortion in the power system. Instead, they support the load and manage the effects of harmonics by allowing for increased thermal capacity.

On the other hand, inductors and filters are specifically designed to mitigate harmonic distortion. Inductors can be used in conjunction with other devices to limit high-frequency components and help filter harmonics. Filters, whether passive or active, are meant to specifically eliminate or reduce harmonic frequencies from the electrical system. While transformers serve a different primary purpose, K-rated transformers are not inherently equipped to address harmonic distortion, making them the correct choice in this context.