Which of the following findings support the hypothesis that Geobacter pili act as electrically conductive nanowires? Choose one or more: A. Celis produce more pili when no oxidant is available. B. Cells genetically modified to produce more pili generate more current. C. Cells unable to produce a type IV secretion system can still generate current. D. Conductivity of isolated pill is not affected by temperature and pH. E. Geobacter produces a current in fuel cells when provided with acetate.