You will be given a definition of a task first, then some input of the task.
In this task, you're given a statement and three sentences as choices. Your job is to determine which sentence can be inferred from the statement. Incorrect choices change the meaning in important ways or have details that are not mentioned in the statement. Indicate your answer as 1,2, or 3 corresponding to the choice number of the selected sentence.

Statement: Water used for culturing and test dilution water should be analyzed for toxic metals and organics at least annually or whenever difficulty is encountered in meeting minimum acceptability criteria for control survival and reproduction or growth. Choices: 1. Water that is used for dilution should be analyzed to see if it's toxic. 2. Water that is used for dilution should be analyzed to see if it's toxic before it is put back in the river. 3. Water that's used for diluting can go right back in the river without testing it.
Output:
1