&lt;?php$color1 = &quot;red&quot;;$color2 = &quot;1&quot;;$color3 = &quot;grey&quot;echo &quot;$color1&quot; + &quot;$color2&quot; . &quot;$color3&quot;;?&gt;
A. 1grey
B. grey
C. 0
D. red1grey
Answer:A
&lt;?php$color1 = &quot;red&quot;;$color2 = &quot;1&quot;;$color3 = &quot;grey&quot;echo &quot;$color1&quot; + &quot;$color2&quot; . &quot;$color3&quot;;?&gt;
A. 1grey B. grey C. 0 D. red1grey
Explanation: + gives the value 1 and . is used to give join 1 and grey.