Answer:
https://www.coursehero.com/file/p1fipq6l/Selected-Answer-True-Question-37-16-out-of-16-points-The-plot-of-Oedipus-Rex/ saw the same question in this
The correct answer is 3. Internet Authority Association (IAA), because it is not a real style of citation. Others are existent and commonly used whereas IAA is not real.
1- first
2- second
3- third
4- fourth
5- fifth
6- sixth
7- seventh
8- eighth
9- ninth
10- tenth
11- eleventh
12- twelfth
13- thirteenth
14- fourteenth
15- fifteenth
16- sixteenth
17- seventeenth
18- eighteenth
19- ninteenth
20- twentieth
21- twenty-first
22- twenty-second
23- twenty-third
24- twenty-fourth
25- twenty-fifth
26- twenty-sixth
27- twenty-seventh
28- twenty-eighth
29- twenty-ninth
30- thirtieth
31- thirty-first
.....continue in same way (thirty-....)
40- fortieth
41- forty-first
...continue in same way (forty-....)
50- fiftieth
