Logical Reasoning Practive Questions:

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Whenever Dieter sings, Jarik gets a headache and kari groans. If kari is not groaning, which of the following statements must be true? A. Dieter is singing and Jarik kas a headache. B. Jarik has a headache but Dieter is not necessarily singing. C. Dieter is singing, But Jarik does not necessarily have a headache D. Dieter is not singing