Code:
Sub ScratchMacro()
'A basic Word macro coded by Greg Maxey
Dim oRng As Word.Range
Set oRng = ActiveDocument.Range
With oRng.Find
.Text = "Answer [A-D]{1}"
.MatchWildcards = True
While .Execute
With oRng
.MoveStart wdCharacter, 7
.InsertBefore "("
.InsertAfter ")"
.Collapse wdCollapseEnd
End With
Wend
End With
End Sub