The correct answer is: B. Department of Defence
The Advanced Research Projects Agency Network (ARPANET) was a packet switching network developed by the United States Department of Defense in the 1960s. It was the first network to use packet switching, which is a method of routing data through a network by breaking it up into small packets and then reassembling it at the destination. ARPANET was the precursor to the Internet, and it is considered to be one of the most important technological developments of the 20th century.
The other options are incorrect. The Federal Aviation Administration (FAA) is a United States government agency that is responsible for the safety of civil aviation. The North Atlantic Treaty Organization (NATO) is an intergovernmental military alliance between 30 North American and European countries. The Universal Asynchronous Receiver/Transmitter (UART) is a computer hardware device that is used to communicate with serial devices.