Eric Lippert's challenge “comma-quibbling”, best answer?

Question

I wanted to bring this challenge to the attention of the stackoverflow community. The original problem and answers are here. BTW, if you did not follow it before, you should

Answer 1

public static string CommaQuibbling(IEnumerable items)
{
  int count = items.Count();
  string answer = string.Empty;
  return "{" + 
      (count==0)  ?  ""  :  
         (  items[0] + 
             (count == 1 ? "" :  
                 items.Range(1,count-1).
                     Aggregate(answer, (s,a)=> s += ", " + a) +
                 items.Range(count-1,1).
                     Aggregate(answer, (s,a)=> s += " AND " + a) ))+ "}";
}

It is implemented as,

if count == 0 , then return empty,
if count == 1 , then return only element,
if count > 1 , then take two ranges, 
   first 2nd element to 2nd last element
   last element