What led to duck and cover drills and bomb shelters in the united states during the cold war ?

Duck and cover is a method of personal protection against the near prompt effects of nuclear explosion. It is useful in conferring a degree of protection to practitioners outside the radius of the nuclear fireball but still within sufficient range that by standing upright death or serious injury is certain. As a countermeasure to the lethal effects of nuclear explosions, it is most effective in the event of both a surprise nuclear attack, which might come at any time without warning, and in the more likely event of sufficient warning of a few seconds to minutes given by a system such as the Pinetree Line, but not enough advance notice to permit an effective evacac.Bomb shelter protected there men from bombs.

Answerthe correct answer is cexplanationthe ordered pair of the relation are: the domain is the set of all the x-values for which the function is defined.these are: therefore the correct option is c.