You are a First Officer for Southwest Airlines. As you are beginning your preflight inspection for a flight from Oakland to Honolulu a maintenance technician comes on the Flight Deck, takes the aircraft logbook and says, 'We are delayed about 30 minutes. One of the hydraulic filter pins is popped". What does this mean? Group of answer choices One of the filters clogged and is in bypass mode An engine-driven hydraulic pump has failed The fluid quantity has dropped below acceptable levels and needs to be refilled