Choose the CORRECT statement. a. The study by Kola (2021) used a qualitative approach wherein the third-year pre-service teachers were considered as a sample. Action research can only include qualitative data. b. The study by Kola (2021) used a qualitative approach wherein the third-year pre-service teachers were considered as a sample. Action research can only include quantitative data. c. The study by Kola (2021) used a qualitative approach wherein the third-year pre-service teachers were considered as a sample. Action research can only be a mixed methods approach. d. The study by Kola (2021) used a qualitative approach wherein the third-year pre-service teachers were considered as a sample. Action research can include qualitative data, or quantitative data, or be a mixed methods approach