单项选择题

It can be inferred from the passage that which of the following would cause researchers to increase their first estimates of a tsunami’s initial height Ⅰ. Records of long periods of aftershocks in the area of the tsunami’s origin. Ⅱ. Observations of seismic energy distributed over a broader area than was initially thought. Ⅲ. Observations of the inundation and run-up period, where the tsunami strikes land.