The answer is:
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[C]: Mercury and Venus.
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Mercury would be "Planet A"; and Venus would be "Planet B".
dinos were probably around pangea, the movement of land would be my guess lol
The line would have to pass through at least two points.
B, both in real history and this chart, America created the first atomic weapons, and Russian spies during WW2 wanted to have the advantage of such power, lest America have a monopoly on pure Force.
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