The correct answer to the question is : The net electric field will be modified, and they may repel or attract depending on the nature of charges.
Step-by-step explanation:
As per the question, initially there was a single isolated charge. The field produced by the charge may be directed towards the charge or away from it depending on the nature of charge.
When another charge is added to the system, the electric field produced by the former one will be modified. If the two charges are of same nature, then they will apply tangential pressure on each. If they are of opposite nature, they will apply longitudinal contraction on each other.
We know that electric field is a vector quantity. Hence, the net electric field at a point in the electric field will be obtained by the vector addition of individual charges.