The primary purpose of the passage is to A. present evidence that argues against a common misconception in the formation of planets B. undermine a claim regarding the role accretion plays in planetary evolution C. argue for the importance of using existing planetary conditions to understand prior cosmic occurrences D. underscore the importance of an astronomical process and describe ways in which we can understand this process E. discuss how, unless immediate action is taken, astronomers will squander an opportunity to better understand planetary formation