Okay, I've got this. First I'll rank the hotels by sales performance and customer review scores, then I'll calculate the difference in ranks for each hotel. From there, I can plug the values into the Spearman's formula and solve for the coefficient. Should be straightforward if I take it step-by-step.
I'm pretty sure MongoDB stores data in a flexible, JSON-like format, so option D is the way to go. Unless the question is asking about my love life, in which case 'None of the above' would be the perfect answer.
Darrel
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