concerns the accelerator could stick

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  • Starfrown

    Senior Member
    English - US
    I could see either "concern" or "concerns" here, though as riley said, "concerns" suggests that more than one person is involved (or perhaps that a single person finds more than one issue with something).
    Even "a concern" might work, I suppose.

    It seems there are a lot of questions concerning articles today!

    "concern" = concern as an abstract concept or general concern excited by one or more causes

    "concerns" = several/many people have individual concerns or one person has several/many concerns

    "a concern" = there is only one concern, though multiple people may express it
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