I use method C. But if I am alone, first I check where is a btc merchant on btcmap.org. If I have to go to a fiat only merchant, I try first the small ones, willing to listen about bitcoin and give them a flyer with some basic info.

Using pre-coiners friends is the best way. You help them get onboard with some btc and they help you to pay your bills. I do not consider this method as "selling your bitcoins" (as using an exchange). This is more a holding method because the bitcoins remain in circulation and not stuck in an exchange to create speculation. For more bitcoins in real circulation, more stable will be the price. Create that fucking bitcoin circular economy.