A staff reading taken on a point whose elevation is to be determined as on a change point is called fore sight-reading. Then the correct option is B.
Foresight is an observation made on an unknown coordinate point (s). Foresight is a reading that looks "ahead" anywhere along the line of movement because a survey advances from a precise location to unknown positions.
A staff reading taken on a point whose elevation is to be determined as on a change point is called fore sight-reading.
Thus, the correct option is B.
More about the fore sight-reading link is given below.
https://brainly.com/question/13251649
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