B) Union Reps don't protect rights in a criminal proceeding, lawyers do. If anything, Unions do more to protect members who SHOULD get fired or prosecuted for misbehavior.
C) Unions work to get DemocRATS elected to power so they can funnel more dues to Unions so they can get more DemocRATS elected to power.
You answered your own question about “bias.”
Have a nice day.