It could have been because their ammunition racks were protected by Water jackets, to prevent fires in the ammunition racks from spreading and potentially causing detonation
While all 3 of B, C, and D played some roll in their decisions, C and D are the only to possible ones in my eyes as secession was not a hot button issue until Carolina's calls for it. I'd reckon it's a 50-50 between C and D, so I'd choose D.
Translate this to english and I can help you
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<span>All citizens could debate and vote on new laws.
Citizens accused of a crime were entitled to a trial by jury
Athens was not a representative democracy, so citizens voted directly on legislation. Slavery existed, and women could not participate in the political system.</span>