B) You can definitely know what you can affect. I don't have to try it to know that just saying "Fuck off Trump!!" on hive is not going to affect anything. I had been doing it for decades for ton of other things to infer that it doesn't amount to anything. If you want to take action write to your representatives, write to other US citizens that are on Hive and encourage them to write to their representatives.

C) China has 2 million active personnel while US has ~1.4 million active personnel.