What does this mean: And if all else fails?

[Snoopy_Blah_Blah]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #74 "At the End of the Day (3)", question 10

And if all else ......... go upstairs and come down again in your pyjamas.

(a) falls
(b) fell
(c) fails
(d) feels

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #74 "At the End of the Day (3)", answer 10

And if all else fails go upstairs and come down again in your pyjamas.

Correct answer: (c) fails

Your answer was: correct
_________________________

"All else" means everything else, doesn't it?

Snoopy_Blah_Blah

[Conchita]

Yes, it does. The expression 'if all else fails' is used to mean 'if all other attempts are unsuccessful'.

Oh, and welcome aboard, Snoopy!

[Snoopy_Blah_Blah]

Thank you:)