Final answer:
The correct electric field diagram for two objects with equal magnitude charges of opposite polarity shows field lines starting from the positive charge and ending on the negative charge, with an equal number of lines associated with each object.
Step-by-step explanation:
The question relates to the characteristics of an electric field diagram surrounding two objects with equal magnitude charges of opposite polarity. Based on Essential Knowledge 2.C.4, the electric field lines between objects with opposite charges would illustrate attraction by starting on the positive charge and ending on the negative charge. The field lines are drawn radially inwards towards a negative charge and radially outwards from a positive charge. If the charges are of equal magnitude, the density of field lines would be the same near both objects, which depicts that the field strength is equal due to the charges being of equal magnitude but opposite in sign.
In the provided options, without seeing the figures, we can infer that the correct diagram (answer to the original question) would show the electric field lines starting from the object with the positive charge and ending on the object with the negative charge, with equal numbers of lines beginning and ending on each object.