Who is called to Salem to investigate the possibility of witchcraft regarding Betty?

The character called to Salem to investigate the possibility of witchcraft regarding Betty is Reverend John Hale. His arrival signifies an important turning point in the narrative, as he is an esteemed minister and expert on witchcraft, sent to determine the nature of the strange occurrences in Salem. Hale’s knowledge and authority contrast with the growing hysteria in the town, and he initially approaches the situation with a desire to help and understand the phenomena surrounding Betty's condition.

Hale's character plays a crucial role in the story, as he evolves from a confident authority figure, eager to root out witchcraft, to someone who ultimately questions the validity of the trials and the motivations of those involved. His initial confidence in the existence of witchcraft reflects the period's fear and superstition but also sets the stage for a deeper exploration of morality and justice in the play.

The other choices represent characters involved in Salem’s trials and investigations but do not possess the specific authority or specialization in witchcraft that Hale has.