Two events are said to be correlated if

A) by determining whether one of the events led to the other

A correlation among variables, nevertheless, does not automatically imply that the variation in one variable is the beginning of the difference in the importance of the other variable. Causation symbolizes that one effect is the outcome of the experience of the other development; i.e. there is a causal association within the two performances.

If the change in values of one set doesn't affect the values of the other, then the variables are said to have "no correlation" or "zero correlation." A causal relation between two events exists if the occurrence of the first causes the other.

 The correct answer is : nurses

Explanation:  The war greatly changed the lives of women and they were allowed to exercise activities that were previously exclusive to men, such as nursing. They performed treatments on wounded and sick soldiers with whom they saved many lives.