单选题Given the following script， why does the output come out as an empty line instead of "dog"？（）AThe $VAR variable was not exportedBThe $VAR should have been set as VARCdog needs double quotes around it when setting $VARDThe { } should not be around VAR i
题目
单选题
Given the following script， why does the output come out as an empty line instead of "dog"？（）
A
The $VAR variable was not exported
B
The $VAR should have been set as VAR
C
dog needs double quotes around it when setting $VAR
D
The { } should not be around VAR in the echo command