<li><pre><code>Which of the following explains the recent growth in the Muslim population of many European nations?
</code></pre>
<p>(A) immigration from former colonies in North Africa and Asia
(B) increasing popularity of Islam among citizens in all developed nations
(C) inclusion of Turkey in NATO, leading to a spread of Islam
(D) diffusion from Muslim merchants in the global economy
(E) European dependence on Arab oil and resulting ties to the Middle East</p></li>
</ol>
<p>The natural answer here seems A, but apparently sparknotes suggests its E.</p>