How can the magnitude and direction of the electric field at specific positions be explained using vector addition of the field vectors of two individual charges?
a) By adding the magnitudes of the field vectors and averaging their directions.
b) By subtracting the magnitudes of the field vectors and summing their directions.
c) By multiplying the magnitudes of the field vectors and taking the average of their directions.
d) By adding the field vectors as vectors, considering both their magnitudes and directions.