What does "fall behind" mean?

[GlummyGuy]

English Language Tests, Intermediate level

ESL/EFL Test #176 "Idioms with the prasal verb fall", question 2

Don't always ......... creating another database or a workaround program because there may actually be a better business solution for the problem.

(a) fall through
(b) fall behind in
(c) fall back on
(d) fall ou with

English Language Tests, Intermediate level

ESL/EFL Test #176 "Idioms with the prasal verb fall", answer 2

Don't always fall back on creating another database or a workaround program because there may actually be a better business solution for the problem.

Correct answer: (c) fall back on
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don't always fall behin in ?

[Mister Micawber]

.
'Fall behind in' means 'fail to keep to schedule', which we don't 'always' do, and which does not make sense in the given sentence.
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Native English teacher at Mister Micawber's

[Lost_Soul]

Just in case you didnt notice, wrong answer d is mistyped (ou instead of on). Maybe it's ok for wrong answers to be mistyped, but I feel obliged to graw your attention to it :)

[Mister Micawber]

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[Torsten]

Hi Lost Soul,

Thanks a lot for pointing out that typo, we'll correct it.
Regards,
Torsten

TOEIC listening, photographs: Lawn tennis

[Lost_Soul]

[Nenad11]

Does don't fall back on something mean don't ommit,miss,fail to do something?

[Mister Micawber]

No. 'Fall back on' = rely on, have recourse to.
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Native English teacher at Mister Micawber's

[Saneta]

a work-around program =a program organized in the way that avoids problems?

thanks

[Mister Micawber]

A workaround is a practical survival technique, in which users eliminate the effect of a programming bug by changing they way they use a system. For example, a user workaround may change the style of data input to achieve a certain type of output. Unfortunately, many workarounds become so widely used that programmers are discouraged from fixing the original bugs (and thereby creating unexpected outputs from the workarounds).
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Native English teacher at Mister Micawber's