The one that you've circled (A) is the correct answer.
Answer:
The alimentary canal (also called the digestive tract) is the long tube of organs including the esophagus, the stomach, and the intestines that runs from the mouth to the anus.
Explanation:
Answer: In 1858, Pasteur filtered air through a gun-cotton filter and, upon microscopic examination of the cotton, found it full of microorganisms.
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Answer: Be organized and understand what you want to do and what you can do
Explanation:
Schedule your time in a way where you are satisfied and you can achieve with ease, don't make your schedule what you want to achieve and be successful with, schedule with things that you can do, don't do more than you can handle.
I am pretty sure it is D
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