in lamb to the slaughter what is the author saying about human experience based on thematic message of the story

Betrayal. “Lamb to the Slaughter” tells of at least one betrayal: Patrick Maloney's unexplained decision to leave his pregnant wife. This violation of the marriage-vow is obviously not the only betrayal in the story, however. Mary's killing of her husband is perhaps the ultimate betrayal.

the answer should be b.

explanation:

it should be b because she researched before writing so it would be in past tense. "the author researches her subject before she had written the first draft.

the switch in narration increases the proximity of the narrator to the main character and the reader can perceive information only through the filter of a single character.