&lt;?php$color1 = &quot;red&quot;;$color2 = &quot;1&quot;;echo &quot;$color1&quot; + &quot;$color2&quot;;?&gt;
A. red1
B. red 1
C. 0
D. 1
Answer:A
&lt;?php$color1 = &quot;red&quot;;$color2 = &quot;1&quot;;echo &quot;$color1&quot; + &quot;$color2&quot;;?&gt;
A. red1 B. red 1 C. 0 D. 1
Explanation: + just returns the numeric value even though it is inside double quotes.