How many elements are in the array newArray after the following code is executed?

```
Dim firstArray() As Integer = {1, 2, 3}
Dim secondArray() As Integer = {3, 4, 5, 6}
Dim newArray() As Integer = firstArray.Concat(secondArray).ToArray
```
How many elements are in the array newArray after the following code is executed?

(A) 7
(B) 6
(C) 3
(D) none