According to the text, which option is correct?
- A The IT and the Al which will be used in unmanned drones in the future have already been successfully developed by the U.S. Navy.
- B Government Accountability Office reported that the Navy had provided an accurate cost estimate in its shipbuilding plan.
- C The U.S. Navy spent a total of $4.3 billion on unmanned surface and undersea drones in five years.
- D GAO states that the U.S. Navy's plan does not consider all the money necessary to develop and operate unmanned maritime systems.
- E The sea service requires a lot of technologies, but commercial software is no longer necessary for it.