Suppose we declare a BASH variable as follows:

$ query="Hello world?"

In what cases would:

$ echo $query

not print "Hello world?" on the terminal?

Question 4 options:

	a)"echo $query" is never the correct way to print "Hello world?".
	b)If a file named world1 is present in the present working directory.
	c)It will always print "Hello world?" without fail due to the quotes.
	d)When the variable "query" previously existed, it will append the old value to "Hello world?".
	If a file named world1 exists anywhere on the file system.