【单选题】
Given the following scripts， what output would be generated（）<br /> usr/local/bin/scriptl   <br /> #!/usr/bin/ksh   <br /> VARl=red   <br /> export VARl=green   <br /> VARl=blue   <br /> /usr/local/bin/script2   <br /> ARl=yellow  <br /> /usr/local/bin/script2    <br /> #!/bin/ksh  <br /> echo "The sky is ${VAR1}."
A、The sky is red.
B、The sky is blue.
C、The sky is green.
D、The sky is yellow.
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