The amount and complexity of the data and forecast model components used. Thus computer resources can be a significant limitation to NWP. ... Most grid point models and all spectral models in the current operational NWP suites are what? ... forecast the release of buoyancy in the atmosphere and its detailed effects
I believe the correct answer would be B. Semipermeable means that it allows certain substances to pass through, and certain other ones to not pass through. So given all of your options, I would say that B makes the most sense. Hope this helped!