When protecting exposures with a solid stream, what should never be done?

Answer: B — Direct elevated streams into natural ventilation openings

When protecting exposures with a solid stream, directing elevated streams into natural ventilation openings should be avoided because it can exacerbate the fire situation. By directing water into these openings, you may inadvertently feed the fire with additional oxygen, potentially increasing the intensity of the blaze instead of controlling it. Proper application of water to manage exposures requires careful strategic consideration of airflow and fire dynamics. The goal is to apply water where it will be most effective in cooling the heat and protecting other structures from the fire's heat and flames, rather than inadvertently making the situation worse.