WHICH OF THE FOLLOWING BEST DESCRIBES THE MAINYOU DON’T HAVE TO USE...

4. Which of the following best describes the mainYou don’t have to use steps 6 and 7, because youtopic of the passage?have one answer left; choice cis the only answer that isa.The immune system is often analyzed andthe main idea of the passage.praised by prominent scientists.b.The skin and its glands are responsible forpreventing most infections.c. The lymphatic system and the skin worktogether to protect the body from infection.d.Communication between the lymphatic sys-tem and the brain is essential in preventingand fighting infection.

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Practice Passage and QuestionAnswerTry another passage and main idea question.Apply the seven steps.