#include &lt;stdio.h&gt;    #include &lt;ctype.h&gt;    int main&#40;&#41;    &#123;        char c = 't';        printf&#40;&quot;%d\n&quot;, isspace&#40;c&#41;&#41;;    &#125;
A. Non-zero number
B. Nothing
C. Error
D. t
Answer:A
#include &lt;stdio.h&gt;    #include &lt;ctype.h&gt;    int main&#40;&#41;    &#123;        char c = 't';        printf&#40;&quot;%d\n&quot;, isspace&#40;c&#41;&#41;;    &#125;
A. Non-zero number B. Nothing C. Error D. t