Given the following scripts， what output would be generated（）
usr/local/bin/scriptl   
#!/usr/bin/ksh   
VARl=red   
export VARl=green   
VARl=blue   
/usr/local/bin/script2   
ARl=yellow  
/usr/local/bin/script2    
#!/bin/ksh  
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.