The answer to your question is D. More concisely
Hope this helps:)
Often, when there is an imminent threat or hazard, the public is told to “shelter in place<span>.” </span>Sheltering in place<span> is a precautionary routine to keep you as safe as possible while indoors during an emergency event. ... Bring everyone into the designated </span>shelter-in-place<span> area, one that is secure and with locks on the doors.</span>
