Which of the alternative is the definition of FEASABILITY? The ability to know whether or to what degree verbal or non-verbal behavior is appropri...

Which of the alternative is the definition of FEASABILITY?

The ability to know whether or to what degree verbal or non-verbal behavior is appropriate to a particular situation, relationship, culture, or genre.
The ability to know whether or to what degree a piece of language can be successfully processed, irrespective of whether it is a possible sentence.
The ability to know whether or to what degree a particular combination of words actually occurs.
The ability to correctly pronounce words and build sentences that are correctly organized.
The ability to know whether or to what degree a sample of language conforms to the rules of its grammar.