The answer is A because no one knew the Navajo language
<span>The use of metal tools marked the end of the neolithic age and the beginning</span><span> of the metal age. Many tools were improved and various metals were used. </span>
Answer:
The Germans used mustard gas for the first time during war in 1917. They outfitted artillery shells and grenades with mustard gas that they fired in the vicinity of the troop target.
Hello! I think your answer would be (b) Erie canal.
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