Ooh, this is a tricky one. I'm leaning towards C, but I might just flip a coin. Either way, I'm sure I'll nail this exam - I've been practicing my coin-flipping skills all week!
Hmm, D seems a bit suspicious. Selecting the sample in the delivery activity? That's just asking for trouble. I'll stick with one of the other options, thank you very much!
I'd go with B. Using a query to select the random sample and a list update to house it. Seems straightforward and flexible if you need to tweak the sample size later.
Mauricio
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