BERKELEY, Calif. (AP) – An effort to block Pacific Gas and Electric’s path out of bankruptcy began with critics questioning whether the votes overwhelmingly backing the plan were tainted by conflicts of interest. The challenge mounted by two critics of the plan kicked off the first day of a trial Wednesday that will determine whether PG&E’s $58 billion proposal for ending its nearly year-and-half bankruptcy wins the approval of U.S. Bankruptcy Judge Dennis Montali. The trial will resume Thursday when PG&E’s chief financial officer is expected to face questions about the plan’s huge debt load.