Giventhefollowingscript,whydoestheoutputcomeoutasanemptylineinsteadof"dog"?()A.The$VARvariablewasnotexportedB.The$VARshouldhavebeensetasVARC.dogneedsdoublequotesarounditwhensetting$VARD.The{}shouldnotbearoundVARintheechocommand
题目
Giventhefollowingscript,whydoestheoutputcomeoutasanemptylineinsteadof"dog"?()
A.The$VARvariablewasnotexported
B.The$VARshouldhavebeensetasVAR
C.dogneedsdoublequotesarounditwhensetting$VAR
D.The{}shouldnotbearoundVARintheechocommand