The correct answer is C. de-distributed.
A decentralized computer facility is one in which the processing power is distributed among multiple computers. This can be done in a number of ways, such as by using a cluster of computers or by using a grid of computers. A centralized computer facility is one in which the processing power is concentrated in a single computer. This is the most common type of computer facility. A distributed computer facility is one in which the processing power is distributed among multiple computers, but the computers are not connected to each other. This is a less common type of computer facility.
De-distributed is not a type of computer facility. It is a made-up word that does not have any meaning in the context of computer facilities.