Answer: the correct answer is A. (I THINK)
Explanation: (HERE IS MY EXPLANATION SO YEAH AND DON"T COPY AND PASTE THIS BECAUSE THIS IS HERE) the two events are correlated, there is an statistical association between both that evidences how they tend to occur together and in the same direction (positive correlation), or together and in opposite direction (negative correlation).
Correlation does not imply causality (therefore D is discarded). It does not provide information about the order of the events, or their features either (therefore it cannot evidence that two events have common characteristics). Hence, B and C are excluded too.