单选题

下面程序输出的结果为:

Question

下面程序输出的结果为:

Object.prototype.execArr = function(){
var array=this
  var n = {}, r = [], len = array.length, val, type
    for (var i = 0 i < array.length i++) {
        val = array[i]
        type = typeof val
        if (!n[val]) {
            n[val] = [type]
            r.push(val)
        } else if (n[val].indexOf(type) < 0) {
            n[val].push(type)
            r.push(val)
        }
    }
    return r
}
var obj=[1,5,4,4,5,6,7,3,3,2]
console.log(obj.execArr ())

A. [1,5,4,4,5,6,7,3,3,2]

B. [1,2,3,3,4,4,5,5,6,7]

C. [1,2,3,4,5,6,7]

D. [1,5,4,6,7,3,2]