Availability of research participants is not typically a challenge faced by educational researchers, as they can usually recruit participants from schools, universities, or other educational settings.

All of the above options are primary ethical considerations in educational research, as they help to protect the rights and well-being of research participants.

Quantitative research methods can be used to study both objective and subjective phenomena, as long as the data is in a numerical format.

All of the above options are limitations of qualitative research methods in education, as they can make it difficult to draw conclusions that apply to a larger population.

Availability of qualified researchers is not typically a challenge associated with conducting educational research in developing countries, as there is often a large pool of potential researchers with the necessary skills and knowledge.

All of the above options are limitations of action research in education, as they can make it difficult to draw conclusions that apply to a larger population.

Availability of qualified researchers is not typically a challenge associated with conducting educational research in rural areas, as there is often a large pool of potential researchers with the necessary skills and knowledge.

All of the above options are limitations of experimental research in education, as they can make it difficult to draw conclusions that are valid and reliable.

Availability of qualified researchers is not typically a challenge associated with conducting educational research in urban areas, as there is often a large pool of potential researchers with the necessary skills and knowledge.

All of the above options are limitations of correlational research in education, as they can make it difficult to draw conclusions that are valid and reliable.

Availability of qualified researchers is not typically a challenge associated with conducting educational research in low-income countries, as there is often a large pool of potential researchers with the necessary skills and knowledge.

All of the above options are limitations of case study research in education, as they can make it difficult to draw conclusions that apply to a larger population.

Availability of qualified researchers is not typically a challenge associated with conducting educational research in middle-income countries, as there is often a large pool of potential researchers with the necessary skills and knowledge.

All of the above options are limitations of survey research in education, as they can make it difficult to draw conclusions that are valid and reliable.

Availability of qualified researchers is not typically a challenge associated with conducting educational research in high-income countries, as there is often a large pool of potential researchers with the necessary skills and knowledge.