For each question include sampling method presented is eithe a probability or nonprobability. Identify specific sampling method used and provide a rationale for the sampling method you chose

28 EXERCISE 2 . Identifying Probability and Nonprobability Sampling Methods in Studies 2. Study excerpt: "This study was a part of a multi-site prospective observational study of COPD [chronic obstructive pulmonary disease] patients to explore the relationship between depres- sion, inflammation, and functional status . . . Participants were recruited from various sources including outpatient clinics from three medical centers, pulmonary rehabilitation programs, a research database maintained by the investigators, queries of medical records and pulmonary function tests, Better Breathers Club, community pulmonary practices, advertisements, study website, and other referrals." A total of 282 patients with COPD were included in the study. Source: Lee, J., Nguyen, H. Q., Jarrett, M. E., Mitchell, P. H., Pike, K. C., & Fan, V. S. (2018). Effect of symptoms on physical performance in COPD. Heart & Lung, 47(2), 149-156. Excerpt from page 150