Case 2-2 Max Recently Came Back from Australia,where He Developed a Web

Case 2-2
Max recently came back from Australia,where he developed a Web site about Australian animals.He used the following image to create the code for an image map,shown below the picture.When he tested the code in a browser,he discovered that the code does not work properly.He asked his brother Ethan to help him fix the code.Ethan asked him several questions in order to help him.(Note: The image size is 420 x 280 pixels. )
<p><map imagename="Australia">
<area shape="rect" coords="20,20,230,160" href="parrots.htm" alt="Australian Parrots" title="Australian Parrots Page" />
<area shape="rect" coords="100,20,440,160" href="penguins.htm" alt="Australian Penguins" title="Australian Penguins" />
<area shape="poly" coords="20,160,230,300" href="kangaroos.htm" alt="Australian Kangaroos"
title="Australian Kangaroos" />
<area shape="rect" coords="230,160,440,300" href="koalas.htm" alt="Australian Koalas"
title="Australian Koalas" />
</p>
-Ethan discovered that the values for one of the four coords attributes is incorrect,so the areas of the image are overlapped.Which one needs to be corrected?

A) 20,20,230,160
B) 100,20,440,160
C) 20,160,230,300
D) 230,160,440,300