B.
it's literally common sense
Hmmm when they say that we have a debt of $10,000 but you don't but you don't know that so they ask you for the personal data for your bank so their can get in and get the money for you so you don't have to and that how they trick you
"Avoiding sarcasm" and "using appropriate language" make professional online communication more effective. Not all people immediately understand one's sarcasm especially someone you recently knew. They may misinterpret the message you're giving so better say something straightforward to make yourself clear. A place where people can easily gather, the internet can make people against you if you're displaying rude and foul comments. Failure to communicate will then follow. If you follow these two guidelines, you're going to be saved from all the troubles.