Who among the following theorists has written on narrative empathy?

The correct option is Suzanne Keane.

Suzanne Keen (often spelled Suzanne Keane in some curricula/question papers) is a prominent literary theorist and professor who has written extensively on the concept of narrative empathy.
Narrative empathy is the sharing of feeling and perspective-taking induced by reading, viewing, hearing, or imagining narratives of another's situation and condition.
Keen's seminal work, Narrative Empathy (published in 2007), explores how novels and other narrative forms affect readers' empathetic responses and the rhetorical devices that authors use to elicit these emotional connections.