狒狒 70

liberzephyr

70. Alow-pressure weather system is approaching Plainville;rainfall results from about 70 percent of such systems in the Plainville

area. Moreover, the currentseason, spring, is the time of year in which thundershowers, which sometimesresult from low-pressure systems, are most likely to occur in Plainville.
Knowing whichone of the following, in addition to the information above, would be mostuseful for determine the probability that Plainville
will have a thundershower soon?
A.       the percentage ofthundershowers in Plainville
that occur in the spring B.       the percentage of springrainfalls in Plainville
that are thundershowers C.       the percentage ofthundershowers in Plainville
that result from low-pressure systems D.      whether low-pressure systems inother areas are associated with rainfall
E.       whether Plainville
has more or fewer thundershowerseach spring than do near by towns

答案是B还是C