Final answer:
Without specific context or guidelines, it's not possible to determine the minimum net clear openable area from the options provided. Always refer to relevant building or property regulations.
Step-by-step explanation:
The term 'Minimum net clear openable area' often refers to specifications in property or building regulations, rather than a mathematical concept. However, it's typically used in the context of specifying the smallest area necessary for something like a window to be legally compliant. Without a fuller context, we would not be able to specifically answer whether the minimum net clear openable area is 5, 10, 15, or 20 square feet. Therefore, it's essential to consult the specific regulations or guidelines that apply in your scenario.
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