What was the outcome of the first harvest after the rebellion?

The first harvest after the rebellion was the most successful in the farm's history. This outcome reflects the animals' initial enthusiasm and commitment to the revolutionary ideals they had embraced. Following the rebellion, they worked harder to manage the farm themselves rather than under the oppressive rule of Mr. Jones, leading to a collective effort that resulted in abundant crops. This success served as a source of motivation and pride for the animals, reinforcing their belief in their ability to govern themselves and achieve prosperity without human overseers.

The other options do not align with the narrative presented in George Orwell's "Animal Farm." The notion of a poor or average harvest contradicts the early optimism the animals felt, and the idea of it being less than expected does not capture the momentous success they experienced at that time.