Researchers have noted that children that learn to play a musical instrument through taking lessons have higher average SAT scores, higher average GPA and higher average class rank. This is an example of A. an experiment. B. an observational study. C. the establishing of a causal relationship through correlation. D. a block design, with music and no-music groups as blocks. Please explain why Solution B. an observational study. THis is an observation done on the students Hence option B.