How to make a single numbered list item marker bold?

[rajayonin]

I’m doing a questionnaire and want to mark the correct answer (an item of a numbered list) in bold. But my current approach (shown below) makes only the text, not the marker, bold:

#set enum(numbering: "a)")

#let correct(answer) = {
  show enum.item: strong
  answer
}

What is the best number?
+ one
#correct[+ two]
+ three

I’ve also tried setting enum directly, which works, but it resets the numbering counter:

#let correct(answer) = {
  show enum: strong
  answer
}

What is the best number?
+ one
#correct[+ two]
+ three

[Y.D.X]

I guess there exists a better solution, but at least this works:

#show enum: it => {
  if it.at("label", default: none) == <processed> {
    return it
  }

  let args = it.fields()
  let children = args.remove("children")
  let correctness = children.map(c => c.body.at("label", default: none) == <correct>)

  show <correct>: set text(weight: "bold") 
  [#enum(
    ..args,
    numbering: n => {
      set text(weight: "bold") if correctness.at(n - 1)
      numbering("a)", n)
    },
    ..children,
  )<processed>]
}

What is the best number?
+ one
+ two<correct>
+ three