I. The colony's residents' society has decided to put up

I. The colony's residents' society has decided to put up volunteers for keeping vigil at night.
II. The police has failed to control petty thefts in the city.

1. If statement I is the cause and statement II is its effect
2. If statement II is the cause and statement I is its effect
3. If both the statements I and II are independent causes.
4. If both the statements I and II are effects of independent causes.
5. If both the statements I and II are effects of some common cause.

We get the answer by constructing the phrase: Because II therefore I.