GRE Text Completion: Fundamental 24 Sets-GRE填空基础24套 - Y107275E61J074_0!

For centuries, sailors have reported seeing the surface of the ocean glowing with a uniform milky light, a (i)____________ scientists say may be (ii)____________ by luminescent bacteria. A. phenomenon B. validated C. boon D. exacerbated E. quandary F. generated