If Jacob thinks there is overwhelming evidence for the existence of God, especially in light of what he thinks is the apparent design and fine-tuning of the universe, but John claims that the obvious existence of evil argues against the rationality of Jacob’s belief in the existence of God, then John has

Jhon has a paradox, in other words, the question is raised as to whether God exists because there is so much evil and suffering?

Explanation:

With this argument he attacks the faith of Jacob who defends the existence of God by the order so wonderful that there is in the universe, and it is that to tell the truth, we can see the relationship of the order with the clean, the good, the organized, the point here is that although God's creation is perfect, intelligent beings with the ability to reason and think that God has created have freedom of determination to make decisions, something they have not known how to do well, since the ambition for power and wealth they lead him to act badly, then we could say that although God is the creator, he is not the originator of the evil that exists in the world.

i would say b. research typically uses a variety of sources