Literally just do a colon and parenthesis :(
:( :-(
Answer:
the answer to your question is obviously "rational"
You press and hold the "b" button on your left earmuff, but you have to hold it down as long as you want ANC (Automatic Noise Cancelling) to be turned off, in other words, as soon as you release the button, ANC will be turned back on. Unfortunately, this will also mute your music.
Answer: A. Usability testing
Explanation:
Usability testing would be the correct answer because if the user interface isn't "frendly" then people won't be able to use it properly. Or if you are refering to the word friendly as looking safe, then even more so would be usability testing. Because if people don't like the fonts and styles of the user interface, they might not use it at all.
