The answer is definitely B, 5 levels. Anything more and you're just asking for a spaghetti mess of code. Although, I do wonder if the exam writers have ever heard of the concept of 'modular design'.
Unlimited? No way, that's just asking for trouble. It's like a never-ending Russian doll of scripts. I'm going with 2 levels, just to be on the safe side.
Hmm, I'm pretty sure it's 5 levels. That's the sweet spot for nesting, right? Not too shallow, not too deep. Just a nice, cozy little nest of OmniScripts.
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