单项选择题

Given the following script， why does the output come out as an empty line instead of "dog"（）#!/bin/ksh
$VAR=dog
echo "${VAR}"

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.

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Given the following script， why does the output come out as an empty line instead of "dog"（）#!/bin/ksh $VAR=dog echo "${VAR}"

Given the following script， why does the output come out as an empty line instead of "dog"（）#!/bin/ksh
$VAR=dog
echo "${VAR}"