<span>B.because some subordinate ideas are important and must be indicated with free-floaters
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Sometimes different notes and ideas are important to the overall topic, but they are not directly related to your main mind map. Having free floaters will help keep track of ideas that might not feel like they're major, but looking through at the end of the passage, chapter, or novel might connect all together as important subordinate ideas.</span>
I think the first sentence is correct, and you should remove the word have in the second
<h3>I hope it's helpful for you</h3>
I believe it would be an irregular verb.
