In the context of heuristic search strategies, what is the impact of using an inadmissible heuristic on the solution's optimality? Choose an answer below.

It underestimates the costs, making the search process slower but more accurate.

An inadmissible heuristic has no impact on the solution's optimality.

It guarantees to find the most optimal solution faster.

It may lead to a solution that is not optimal by overestimating the cost to reach the goal.