A. mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY); B. mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); C. mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION); D. mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE);