Why is using slang not appropriate in a business setting?

here are the choices
Slang is appropriate if you are extremely familiar with your audience.
Slang displays a tone that is too casual.
Slang is inappropriate unless it is countered by the use of jargon.
Slang is an example of pathos and considered unprofessional.
none of the above

Question

Why is using slang not appropriate in a business setting?

here are the choices
Slang is appropriate if you are extremely familiar with your audience.
Slang displays a tone that is too casual.
Slang is inappropriate unless it is countered by the use of jargon.
Slang is an example of pathos and considered unprofessional.
none of the above

anonymous · Answer

Slang is typically considered childish, immature, and unprofessional when regarding to a "business setting".