Receive and display an array of C # in JavaScript

I have an array of C # that I need to show when I enter a certain page. I am making a request with AJAX to receive this data.

$.post({
        url: '/Home/MostrarArray',
        success: function (datas) {
            console.log(datas);
        }
    });

These being my AJAX request and:

[HttpPost]
public string[] MostrarArray()
{
    string[] matArray = new string[] { "uno", "dos", "tres", "cuatro" };

    Array.Sort(matArray);
    return matArray;
}

The function that I call.

What it returns to me (what console.log(datas) shows) is a String , literally: System.String[]

I'm not sure how to get the array back and not the "type" of data ... Any idea what I'm doing wrong?