Which three chapters were present at the First National Convention?

The correct answer highlights the presence of specific chapters at the First National Convention, which took place in 1919. At this historic event, a total of 22 chapters were represented, but Alpha, Gamma, and Epsilon are among the original chapters that significantly contributed to the formation and establishment of the sorority.

Alpha is particularly important as it is the very first chapter, representing the founding members of Delta Sigma Theta. Gamma and Epsilon also played crucial roles in expanding the sorority's reach and influence during its formative years. This convention was essential for solidifying the organization's structure and mission, setting the stage for future growth and initiatives within the African American community and beyond.

In contrast, the other options do not accurately reflect the chapters that were present at the convention, thus emphasizing the historical significance of Alpha, Gamma, and Epsilon in the early days of Delta Sigma Theta.