Final answer:
Without additional information regarding the relationship between the vectors, it is impossible to accurately determine the magnitudes of the other two displacement vectors from only knowing the magnitude of one vector.
Step-by-step explanation:
The question involves determining the magnitudes of two unknown displacement vectors given the magnitude of a third vector. In Physics, displacement vectors represent the change in position of an object and have both magnitude and direction; they are vector quantities. The reference information provided suggests the use of scale drawing or analytical methods to ascertain the magnitude of displacement vectors. However, as the information provided is insufficient to deduce the magnitudes of the other two vectors, we cannot provide an answer to which option is correct. Displacement is different from distance in that displacement is a vector quantity and has a direction associated with it, while distance is a scalar and only has magnitude.