What factor is NOT mentioned in choosing a forecasting method? Persistence method will work well

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问题 What factor is NOT mentioned in choosing a forecasting method?
Persistence method will work well

选项 A、if weather conditions change greatly from day to day.
B、if weather conditions do not change much.
C、on sunny days.
D、on rainy days.

答案B

解析答案可在第二段第二句中直接找到，其后是具体例子，用于说明persistence method只有在天气状况基本不变的情况下才能有效使用。

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