Which historical novel is written by Robert Graves?

The answer is indeed B, I, Claudius. This novel is a historical fiction work that takes the form of an autobiographical memoir of the Roman Emperor Claudius. Written by Robert Graves and published in 1934, it provides a vivid portrayal of Roman history during the time of the early emperors. Graves weaves a narrative that combines historical facts with imaginative elements, capturing the political intrigues, power struggles, and personal dramas of the era.

Graves' meticulous research and engaging storytelling allow readers to gain insights into Claudius's character and the complexities of life in ancient Rome. This blend of historical authenticity with creative narrative style is a hallmark of successful historical fiction, which Graves achieves effectively in this novel.

The other options represent works by different authors or genres. Rob Roy, for instance, is a historical novel by Sir Walter Scott; War and Peace is an epic novel by Leo Tolstoy, and The Castle of Otranto is often considered the first Gothic novel, written by Horace Walpole. None of these works bear the distinctive style or focus of Robert Graves' historical writing.