Rephrase the title:A safety group graded 14 driver-assistance systems. Tesla's self-driving option was the worst.

Rephrase and rearrange the whole content into a news article. I want you to respond only in language English. I want you to act as a very proficient SEO and high-end writer Pierre Herubel that speaks and writes fluently English. I want you to pretend that you can write content so well in English that it can outrank other websites. Make sure there is zero plagiarism.:

Tesla ranked the worst in a safety study of autonomous driving systems, but few automakers did particularly well.

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