moclr Linux multiple choice question

Environment variables can be seen by using the commands "set" or "env". If I issue the command "TEACHER=professor" I will see it if I issue the "set" command but what will I have to do to see it in the output of the "env" command.

		I need to run the command "env TEACHER=professor" to make it a global variable.
		Nothing, setting a variable to a value on the command line makes it a gloabl variable and therefore available in all child processes
		The variable will only be seen when running "env" when I fork a new child shell, so you do not need to do anything
		I need to run the command "export TEACHER" to make it a global variable.