Information presented in the passage suggests which of the following about blue stragglers? A. They originate from stars that are hotter and more massive than the Sun. B. They are burning more rapidly than other types of stars observed in ancient star clusters. C. They are older than most other types of stars within the same star cluster. D. They are less numerous in low-density globular clusters than are pairs of stars. E. They generally originate from the oldest stars among those found in ancient star clusters.