I have had more apologies than abuse on those occasions when I have politely said Good Morning, then explained how out of all of the cars which passed me today theirs was by far the closest, and dangerously so, and perhaps if they weren't on the phone they'd have noticed me sooner & been able to pass safer, please try to leave more space next time etc etc..
Calm, no hand signals, no profanity, almost friendly, and next time the pass is much safer.
It does sound like Car A was being driven by an imbecile though..
I wrote a polite letter to such an imbecile who lives around the corner from me & stuck it under his wiper blade later that day when his car was parked in the drive. He hasn't repeated his dangerous driving around me since then, despite many opportunities.