Expression: in the air means "it's not definite"?

[JayLo]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #409 "Air Idioms", question 3

There's a lot of discussion in the air about it -- means: ..........

(a) that's not definite
(b) that's not available
(c) that's not present
(d) that's not open

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #409 "Air Idioms", answer 3

There's a lot of discussion in the air about it -- means: that's not definite.

Correct answer: (a) that's not definite
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the answer is right or wrong?

JayLo

[Alan]

Hi,

The correct answer is: That's not definite.
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English as a Second Language
You can read my ESL story Saying It Twice

[Yankee]

My first interpretation of that sentence would be that 'it' is currently a popular or widespread topic of conversation. In other words, the words 'in the air' could basically be replaced by the word 'about'.

To me, when something is not definite or unsettled, it is "up in the air".
.