Direction : Two statements I and II are given. These statement may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statements. Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements. 

I. There is increase in water level of all the water tanks supplying drinking water to the city during the last fortnight.

II. Most of the trains were cancelled last week due to water-logging on the tracks.