Why did the authors select ANCOVA in the research?

References

Hunt, C., Gibson, G. C., Vander Horst, A., Cleveland, K. A., Wawrosch, C., Granot, M., Kuhn, T., Woolverton, C. J., & Hughes, J. W. (2021). Gender diverse college students exhibit higher psychological distress than male and female peers during the novel coronavirus (COVID-19) pandemic.Psychology of Sexual Orientation and Gender Diversity,8(2), 238-244. https://doi.org/10.1037/sgd0000461