Canadian scientists have calculated that a meteorite will strike one human being once in every nine years, while each year 16 buildings can be expected to sustain damage from such objects.
The phrase once in every nine years is needlessly wordy in B and C. Also, the language of C implies more than can reasonably be maintained: i.e., that a meteorite will strike one person, and no one else, exactly once during every nine-year period.
把网站装进口袋
随时随地练习