I believe it's A) Change the comma to a semi-colon hope this helps :)
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</span><span>Georg Steinhauser was a scientist who wanted to know what the lint in out bellybutton really was. Well he found out. He also found out how it got there. Cotton, dead skin, sweat, dust, and fat makes up our lint. But our lint has a purpose also! It protects us from germs and unwanted objects from finding a home in our bellybutton.</span>
<span>An essay type of writing stating the opinions of the publisher is called an Editorial.</span>
