I have been entering the -n a.txt and it's not working. What am I doing wrong?

You could try -n then press tab to get to the next answer space

Complete the final command to print out the contents of both the b.txt and c.txt files (in that order).

treehouse:~/workspace$ ls
a.txt  b.txt  c.txt
treehouse:~/workspace$ cat

after many tries I figure it out: b.txt c.txt

There are two separate answer spaces. -n goes in one and a.txt the other.

Thank you there must be a glitch I don't see two separate answer spaces.

I have done that there is not another space its only one space to put an answer.

Complete the final command to print out the contents of both the b.txt and c.txt files (in that order).

This question has two separate spaces

Why is the option done first? not cat a.txt -n?