The correct answer is C) Reduced fuel consumption. A build-up of deposits in a gas turbine compressor will typically lead to increased combustion gas temperatures (A), restricted air flow (B), and turbine blade corrosion (D). However, the build-up of deposits will not result in reduced fuel consumption. Instead, the deposits will cause the compressor to operate less efficiently, leading to increased fuel consumption as the turbine requires more fuel to maintain the same power output.