I've got a good feeling about this one. The label has to be mandatory, right? I mean, how else would you identify the campaign? I'm pretty confident that's the right answer.
Okay, let's see. Label and start date both seem like logical options, but I'm wondering if the plan or channel could also be required. I'll have to read the question again to make sure I don't miss anything.
Hmm, this one seems pretty straightforward. I think the answer is probably Label, since that's the basic information you'd need to create a new campaign.
I'm a bit unsure about this one. The question mentions storing metadata and a unique ID for each file, so maybe a key-value store like Redis or Cassandra would be a better fit?
Alright, I think I've got it. The main thing is to establish the proper relationships between the entities to link the contact, address, and rating information together. I'll focus on those three actions.
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