Since it's declarative, it ends with a period. We should add some commas as well.
<em>S</em>chool began on a cold<em>,</em> <em>S</em>eptember morning<em>.
</em>
That should work.
Yes, I believe D is correct. That topic sentence seems to be the only one, out of the other options, to address everything in the paragraph.
i would say "The class gave her many ideas for the project, but she used only one." i'm sure since it's been 6 days you know this sksk
Answer::
the guide,stopping in his tracks,realizes the truth.