12. Which of the following research questions is an example of correlational research? A. Is there a difference in the height of Mung Bean in setup A from setup B after various treatments? B. What are the various learning modalities offered in Gusa Elementary School for SY 2020-21? C. Is the pre-online tutorial effective in preparing preschool for distance learning? D. What is the relationship between time spent on texting and spelling ability?