The correct answer is A. SPANAR.
SPANAR stands for Scalable, Secure, and Distribution Tolerant Mesh Network for Army Applications. It is a network that is designed to be scalable, secure, and tolerant of failures. It is being developed by the U.S. Army to protect strategic military assets.
SPANAR is a mesh network, which means that it is a network of nodes that are connected to each other in a mesh topology. This means that there is no central node in the network, and each node can communicate with any other node in the network. This makes SPANAR a very robust network, as it can continue to function even if some of the nodes in the network are lost or damaged.
SPANAR is also a secure network. It uses a variety of security features, such as encryption, to protect the data that is transmitted over the network. This makes SPANAR a good choice for networks that need to protect sensitive data.
Finally, SPANAR is a scalable network. It can be easily expanded to accommodate more nodes, and it can be used to connect a variety of different types of devices. This makes SPANAR a good choice for networks that need to be able to grow over time.
The other options are incorrect because they are not networks that are being developed by the U.S. Army to protect strategic military assets.