GRE Reading Comprehension: ETS-GRE阅读ETS - P29256W5JJF1KT617

The passage suggests that which one of the following would most help to resolve the question of whether asteroids have satellites? A. a review of pre-1978 reports of secondary occultations B. an improved theoretical model of stable satellite systems C. a photoelectric record of a well-behaved secondary occultation D. a more stringent definition of what constitutes a well-behaved secondary occultation E. a powerful telescope that would permit a comparison of ground-based observation with those made from airplanes