&lt;?php       define&#40;&quot;GREETING&quot;,&quot;Hello you! How are you today?&quot;&#41;;       echo constant&#40;&quot;GREETING&quot;&#41;;   ?&gt;
A. Hello you! How are you today?
B. GREETING
C. GREETING, Hello you! How are you today?
D. “GREETING”,”Hello you! How are you today?”
Answer:A
&lt;?php       define&#40;&quot;GREETING&quot;,&quot;Hello you! How are you today?&quot;&#41;;       echo constant&#40;&quot;GREETING&quot;&#41;;   ?&gt;
A. Hello you! How are you today? B. GREETING C. GREETING, Hello you! How are you today? D. “GREETING”,”Hello you! How are you today?”
Explanation: The define() function defines a constant.