Directions: In the following question, a statement is followed by two assumptions I and II. You are to consider each statement and assumption(s) that follow, and decide which of the assumption(s) is/are implicit in the statement.

Give answer (1) if only I is implicit; (2) if only II is implicit; (3) if both I and II are implicit; (4) if neither I nor II is implicit.

Statement: If water pollution continues at its present rate, it will eventually make oxygen molecules unavailable to water plants. Assumptions: I. Water pollution affects the growth of water plants. II. Water pollution reduces the availability of oxygen in water.