The correct response is: The general is ridiculing Ivan, as well as himself, for being a Cossack.
This choice highlights the underlying commentary on stereotypes and cultural attitudes, which is a hallmark of satire. The general's remarks about Ivan reflect a condescending and prejudiced view of Cossacks, suggesting a primitive or savage nature. This not only pokes fun at Ivan’s disability but also exposes a sense of superiority over his own kind, demonstrating the absurdity inherent in such biases.