B. As rainfall increases, the number of umbrellas sold increases.
Step-by-step explanation:
This is the sentence in which correlation most likely implies causation. Correlation refers to two events that happen at the same time. When two events are correlated, they share a statistical relationship. However, this does not imply that the two are related by causation. Two events that are related by causation are those in which one event can be considered the cause of the other one. In this case, it is likely that the rise in rainfall has led to the rise of umbrellas sold.
