A statement is given followed by two Courses of Action, I and II. Consider the statement to be true and on the basis of the information given in the statement, decide which of the suggested courses of action logically follow(s) for pursuing.

Statement:

Cases of dengue fever are rising in the city.

Course of Action:

I. Mosquito breeding sites should be traced and treated immediately.

II. Mosquito net or repellants should be used during the night.