With a smirk, the______historian takes it as a professional obligation to parade human nature always as an object of______.（）

A、 Ware relies upon a different body of evidence than previous anthropologist have, but reaches the same conclusions.
B、 Ware ascribes a less dominant role to weather than had been traditionally posited by anthropologists.
C、 Ware ascribes a more dominant role to weather than had been traditionally posited by anthropologists.
D、 Ware believes weather played a role in the evacuation, but not the one traditionally cited.
E、 Ware believes that another factor besides weather was responsible for the Great Drought.

A、 The probability is higher if the impact produces a crater larger than three kilometers.
B、 The probability is lower if the impact produces a crater smaller than three kilometers.
C、 The probability is decreased when the impact comes from an area of Mars covered by debris.
D、 The probability is decreased when the fragments produced by the impact are larger than 10 centimeters.
E、 The probability is decreased when the fragments produced by the impact are younger.