Can someone finish the sentence

In the 20th century, the frenzy of competition between Industrial Powers exploded into the deadliest conflict in human history, the .

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explanation:

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.

the founding fathers did not think women were asmportant as mern were and men could do more and better things then women