Answer:
The answer is "Option B".
Explanation:
In the database, the term SPSD is used. It is located on the host computer that helps to access connected dumb terminals. It is usually running on under multitasking, time-sharing operating systems, that enables you to use multiple processes to run simultaneously on a host computer accessing a single DP. It is not used for end user's sides, that's why it is not correct.
