The correct answer is: A. Satellite station
A satellite station is a secondary station used in triangulation to provide additional control points. It is located close to the main triangulation station, to avoid intervening obstructions.
An eccentric station is a station that is located off the main triangulation network. It is used to provide additional control points in areas where the main network is not dense enough.
A false station is a fictitious station that is used to improve the accuracy of the triangulation network. It is located in an area where there is no obstructions, and its coordinates are calculated based on the coordinates of the other stations in the network.
A pivot station is a station that is used to establish the horizontal control of a survey. It is located at a point that is accessible from all sides, and its coordinates are determined by astronomical observations.