The predominant emotion running through the poem “Cristina” by Robert browning is that of

The correct option is Love.

Robert Browning's poem "Cristina" is a dramatic monologue that explores the themes of intense passion, spiritual connection, and unrequited love.
The speaker in the poem reflects on a brief, silent glance exchanged with a woman named Cristina, believing that this single moment established an eternal, soul-binding connection between them.
Even though Cristina may have moved on or treated the encounter lightly, the speaker remains consumed by a profound, romantic, and transcendental love, which remains the central and driving emotion of the entire poem.