Answer:
O The characters had solid proof that there were, in fact, witches living amongst them.
Step-by-step explanation:
In the novel The Crucible, it was about a story which revolves around witchcraft that was practiced by some people in their place. This has caused an unimaginable loss to people leading to the quest to prove that, there was indeed witchcraft and it exists.
During their investigation, they were able to get the solid and water-tight proof showing that it truly exists but don't actually know who amongst them is the one. These led to the accusation among each other of possibly being the one.