Which author had a third book published posthumously that featured poems by Sulpicia?

The correct answer is Tibullus. He is known for his poem collection, the "Corpus Tibullianum," which includes a third book published after his death that features the works attributed to Sulpicia, a female poet of the same era. Sulpicia's poems are significant as they provide a rare glimpse into the voice and experiences of a female poet in ancient Rome, especially in a literary landscape predominantly occupied by male voices.

Tibullus himself is recognized for his elegiac poetry, often focusing on themes of love, nature, and personal reflection. The inclusion of Sulpicia's work underscores the collaborative and intertextual nature of Roman poetic traditions, where poets would sometimes include or respond to the works of their contemporaries and predecessors. This context enhances Tibullus's reputation, as it showcases his influence and the lasting impact of his poetry beyond his lifetime.

While Catullus, Ovid, and Cicero were all prominent figures in Roman literature, their works do not feature Sulpicia in a posthumous collection. Catullus is primarily known for his love poems and engagement with personal emotion, Ovid is famous for his narrative poetry and myths, and Cicero is celebrated for his oratory and philosophical writings