Unlike most other developed nations, where public transportation is heavily subsidized, the United States relies primarily on individual car ownership for commuting.

✓ Correct Answer: Option D

The original sentence makes an illogical comparison between 'most other developed nations' (a country) and 'the United States' (a country's reliance). Option D correctly compares 'the public transportation in most other developed nations' to 'the United States' reliance on car ownership, ensuring a logical comparison.