Final answer:
When answers only differ by commas, it tests understanding of punctuation. In the given example, the correct use would be 'or removed from,' without commas disrupting the phrase. Any additional, non-essential information in a sentence should be enclosed within commas.
Step-by-step explanation:
When a question presents answers that are only differentiated by commas, the focus is on understanding the correct punctuation required within the context of the sentence. In the context of your example: 'This is how carbon can be sequestered, or removed from the atmosphere', the correct usage of commas would be Option B) 'or removed from,' as the information following needs to be connected without interruption.
The use of commas in this context is guided by the rules of English punctuation, which state that extra - or non-essential - information within a sentence needs to be enclosed within commas. For example, 'The math curriculum, currently in use, isn't meeting current needs.' Here, 'currently in use' is extra information and is therefore surrounded by commas. If the extra information is taken out, the sentence still makes sense.
Such questions are typically designed to test a student's comprehension of English language mechanics, and in the given case, specifically the use of commas in sentence constructions.
Learn more about comma usage