Why did the team choose to measure the parallax of nearby stars, whose distances are already well known? Choose one or more: A. New Horizons had traveled so far from Earth that only nearby stars were readily visible to the spacecraft. B. Techniques measuring distances to farther stars rely upon accurate estimates of distances to nearby stars. C. With longer baselines, it is difficult to measure parallax shifts, so only distances to nearby stars are accurate. D. This was an experiment that validated and refined previous measurements of distances to nearby stars. E. It is easier to measure parallax shifts of nearby stars than to measure the shifts of more-distant stars