&lt;?phpfunction start&#40;$string&#41;&#123;    if &#40;$string &lt; 45&#41;        return 20;    else        return 40;&#125;$t = start&#40;90&#41;;if &#40;$t &lt; 20&#41;&#123;    echo &quot;Have a good day!&quot;;&#125;else&#123;    echo &quot;Have a good night!&quot;;&#125;?&gt;
A. Have a good day!
B. Have a good night!
C. ERROR
D. None of the above
Answer:A
&lt;?phpfunction start&#40;$string&#41;&#123;    if &#40;$string &lt; 45&#41;        return 20;    else        return 40;&#125;$t = start&#40;90&#41;;if &#40;$t &lt; 20&#41;&#123;    echo &quot;Have a good day!&quot;;&#125;else&#123;    echo &quot;Have a good night!&quot;;&#125;?&gt;
A. Have a good day! B. Have a good night! C. ERROR D. None of the above
Explanation: Function returns 40. this is greater than 20, hence the output.