Why is b incorrect?

I understand why answer choice a is correct-but could someone please point out why exactly answer...

Serra Monday at 10:54PM

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Answer choice explanation

Struggling with the difference between A and C. Can someone help to explain?

Will on April 29 at 06:11PM

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Explanation

For this question my answer was E- because if there are more people harbouring H pylori than M tu...

Letitia on December 16 at 07:51PM

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Please Explain

It seems to me like answer choice A is stating the flaw backwards so I was wondering if you could...

Rachel on May 6, 2018

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Please Explain

Could you please explain why answer choice A is not supported by the info?

Rachel on May 6, 2018

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Answer

Please explain why the correct answer is what it is. Thank you

Oreal on July 8, 2015

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Answer

Please explain why the answer is not D. Thank you

Oreal on July 8, 2015

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