In the question below, an argument is given, followed by three statements that either strengthen or weaken the given argument. From the options, choose the one that presents the correct relationship each statement bears with the given argument. Note:- 'S' stands for strengthening statement, and 'W' stands for weakening statement. Argument: Environmental groups argue that increasing urban green spaces can significantly reduce air pollution levels in major cities. Statements:
I. A recent study shows that cities with more parks and green belts have recorded lower particulate matter levels over the last five years.
II. Urban planners state that creating new green spaces is extremely costly and may not yield substantial environmental benefits.
III. Researchers found that planting dense clusters of trees along roads can reduce vehicular pollution by up to 20%.