How to act in thailand<br>Avoid getting angry or raising your voice in public places. In thailand, the people are not confrontational. [substeps] Showing anger may embarrass a thai person and will not help you in your endeavors.

Based on that paragraph can we conclude that this sentence is true?
It's bad etiquette to talk loudly in public in Thailand

a). Yes
b). It's impossible to say
c). No
a).